* AssPull: The ending of the "Save Rock and Roll" video, where the band confronts [[spoiler: the monster in the briefcase]] that had absolutely no prior foreshadowing...since they only just thought to include the element of a greater threat than Courtney's gang into the final video instead of hinting at it sooner.
* BaseBreaker: Pete. Fans of the band either worship him and think he's gorgeous and a great bassist or they think he's an irritating attention whore who can't play bass at ''all''.
** [[TakeAThirdOption Or they think that he's a decent enough guy in the attitude and/or bass playing department]] and find most (if not all) of the haterade thrown at him to be unjustified.
* BrokenBase: Over Folie a Deux, though you'll find more people defending it these days than when it was first released. More generally, people who don't like the direction Fall Out Boy has taken since Take This To Your Grave/From Under The Cork Tree versus...everyone else.
* CrackShip: Pete and Creator/TaraStrong, the ship captains of which are [[https://twitter.com/tarastrong/status/413101083339522048 pretty much]] [[https://twitter.com/tarastrong/status/413414444387938304 themselves]]. [[https://twitter.com/tarastrong/status/413414444387938304 And yes, it's been ponyfied]]. Pony fans and Fall Out Boy fans appear to be having more fun than brain aneurisms with the ship. (Mind you, both fandoms ARE big on shipping, even if it's not usually heterosexual...)
* EarWorm: Many.
** "My Songs Know What You Did In The Dark (Light 'Em Up)" is a big one lately.
* EnsembleDarkhorse: Pete Wentz. He also qualifies (qualified?) as TheScrappy.
** Patrick in the eyes of some fans, especially more considering Pete's unconventional frontman role.
* FaceOfTheBand: Pete, and sometimes Patrick. Not many casual fans can name Joe or Andy.
** Oddly enough, Patrick, Joe, and Andy were quite comfortable with Pete being the band's face as it meant the rest of them could lead more normal lives without the media intrusion.
** Gradually being subverted after their 2013 return. They're doing full band interviews as much as possible and even when they're doing interviews only in groups of two, they're avoiding sticking to the tried and true Pete and Patrick combinations. Andy and Joe are more talkative during interviews, Joe more so than Andy. Patrick and Pete banter back and forth much more than they did in shows before the hiatus, and even Andy joins in! Album wise, lyric writing is no longer solely Pete's role and Andy now has a role with backup vocals alongside Joe and Pete. Let's hope it sticks.
* HarsherInHindsight: Take This To Your Grave's [[https://gs1.wac.edgecastcdn.net/8019B6/data.tumblr.com/tumblr_m6fre6A6wU1r17ikto1_1280.jpg distinctive cover]] has all the band members and their names on the cover, an uncommon move. This was done to show that, despite Pete's perceived frontman status, Fall Out Boy as a group was the most important thing. After the band gained mainstream success, the media swarmed in on Pete (who took on a more active frontman role due to the rest of the band's reluctance to do interviews and the like) and his status as the BaseBreaker and TheScrappy was secured up until the hiatus. While Fall Out Boy post-hiatus gives much more consideration to the group instead of merely Pete when it comes to interviews, on-stage banter, and the like, that means it took them a ''decade'' to get back to their original intent for the group's representation.
* HypeBacklash: "Take This To Your Grave", the band's first album, is highly considered to be not only one of the band's best albums (if not THE best), but one of the best pop-punk albums EVER. To say that fans of their later material are somewhat disappointed that people seem more inclined to overhype what they perceive to be an above-average pop punk album at the expense of their other works would be an understatement.
* ItsPopularNowItSucks: Many fans think that the quality of the albums are negatively proportional to how popular they are, which would mean essentially that they haven't done anything good since "Take This To Your Grave"...or "From Under The Cork Tree", if they're feeling charitable.
* MagnumOpus: A decent chunk of fans consider it to be "Take This To Your Grave", with the song "Saturday" being a particular fan favorite. Folie a Deux appears to getting this status among fans over time, especially considering that back in the day, the critical reception was mostly positive, but the fan reception was [[BrokenBase heavily split]], to the point where the band was getting booed for performing the songs on their last tours before hiatus.
** Patrick Stump has said that "Dance, Dance" is the best song that he's ever done, both with Fall Out Boy and in his solo career.
** And, vice versa, there's a large amount of fans that consider ''Save Rock And Roll'' this, between the fact that the entire band wrote all of the songs together and the fact that they took the time to make sure it came out just the way they wanted it, and that it shows their versatility as musicians.
* MemeticMutation: ''Everything'' about "Sugar, We're Goin' Down", whether it's the [[{{Mondegreen}} constantly misunderstood chorus]] or references to the verses.
** From "This Ain't A Scene, It's An Arms Race": I'M A LITTLE MAN, WHO'S ALSO EVIL, ALSO INTO CAAAAAAAATS. Heck, there's even a cute cat picture site named Also Into Cats, [[http://www.alsointocats.com/fall-out-boy-returns/ they even posted about the Fall Out Boy comeback.]]
** "Thanks, Pete", from the band's acceptance speech at the 2014 Alternative Press Music Awards, became popular, especially on {{Website/Tumblr}}, due to Pete actually holding up Patrick to the tall microphone. It even became a Worldwide trending topic on {{Website/Twitter}}, ''and'' the band added a T-shirt with the phrase to their official merchandise.
* SugarWiki/MomentOfAwesome: That one {{incredibly long note}} in "The Take Over, The Break's Over." Also, Patrick's voice, generally.
* NauseaFuel: Pete [[spoiler: eating that apple-heart and then vomiting up blood ''and a snake'' in the "Just One Yesterday" video.]]
** In the "Save Rock and Roll" video, a male FOB fan [[spoiler: gets disemboweled right before his very eyes by Xibalba]].
* NarmCharm: While many found the "My Songs Know What You Did in the Dark" music video to be very unnerving, keep in mind, that's ''[=2Chainz=]'' in in the music video, burning most of Fall Out Boy's backlog for no apparent reason.
** The guest stars seem to cause a lot of it: [[spoiler: the death of]] Big Sean in "The Mighty Fall" is less scary considering he ''raps'' his way through his verse which doesn't fit the mood of the scene (and this is right after he [[spoiler: snaps a kid's NECK]].
* RescuedFromTheScrappyHeap: Those who don't like Pete's face/bass playing/''everything'' probably still have their reasons for keeping him in the heap, but those who think he's an irritating attention whore don't have that much ground to stand on these days. His status as TheFaceOfTheBand has been de-emphasized for the whole band taking part in promotion and interviews and parenting has given him perspective and a grounded attitude. He's not all that interested in celebrity anymore either. As for his bass playing, the jury is still out on that one.
* TheScrappy: Pete. The {{Hatedom}} for this band is mostly because a lot of people really, really, really, REALLY don't like his face/attitude/bass playing/celebrity/''everything''. Judging by the lyrics to "Hometown Hero" from Weekend Nachos (a Chicago-based powerviolence act whose members knew everyone from Fall Out Boy by way of their old bands), a lot of his old hardcore friends ''despise'' him.
* SignatureSong: "Sugar, We're Going Down" or "Dance, Dance" or "Thanks For The Memories".
** "My Songs Know What You Did In The Dark (Light 'Em Up)" is rapidly becoming this, due to its popularity.
* UnfortunateImplications: In "The Youngblood Chronicles", the group that's putting the guys through hell (both figuratively and literally), is comprised mainly of women (the only male members shown so far being children...and 2Chainz). While it took until "Alone Together"/"The Mighty Fall" (4-5/11 videos) for a male character to show up that wasn't royally screwing the guys over in some way, it took until "Death Valley" (8/11 videos) for a female character to show up that wasn't out to kill them, backstab them, humiliate them, avoid them entirely despite them being injured and defenseless, and/or be sexualized (though the nature of The Youngblood Chronicles gives a sense of unease to the sexualization, it still is what it is). Fall Out Boy's video output before this had occasional female saucyness and the varying degrees of female representation were understandable due to them being standalone video. However, having ''several videos in a row as part of a larger narrative'' where most of the people actively out to get the band are women is glaring, especially when a decent chunk of your fanbase is female. The final video for "Save Rock and Roll" ''does'' feature a few female fans and the antagonist ladies getting a HeelFaceTurn, but said HeelFaceTurn is mainly due to [[spoiler: Fall Out Boy coming back to life and granting them that chance with purifying laser instrument attacks.]]
** G.I.N.A.S.F.S, a bonus track off of Infinity on High actually stands for "Gay Is Not A Synonym For Shitty", but for whatever reason, the anti-casual homophobic slurs statement got obscured for its release (instead of, say, swapping out shitty for stupid to make sure it actually showed up on track listings).
* VindicatedByHistory: ''Folie a Deux'', which was adored by critics and a ''massive'' LoveItOrHateIt upon its release (causing some pretty epic FanDumb over it), has rapidly become one of their more popular and well-loved albums since the end of the hiatus. Doesn't hurt that ''Save Rock And Roll'', which was almost universally adored by the fandom, sounds rather similar.
* WTHCastingAgency: Patrick, what are you doing on ''Series/LawAndOrder'' and ''{{Series/House}}''? (PlayingAgainstType and being {{Adorkable}}, respectively.)
** Not to mention Pete on ''{{CSINY}}'' and ''Series/{{Californication}}''! And ''OneTreeHill'', but the less we say about that, the better.
** People have plenty to say about Pete's appearances on TV (especially OneTreeHill) for [[SoBadItsGood one huge reason]]. People also have plenty of things to say about Patrick's appearances on TV for [[HeReallyCanAct a completely different reason]].
** On Fall Out Boy's last headlining tour, Believers Never Die Part Deux, Music/FiftyCent was an opening act for three shows. While some people weren't pleased, most were just ''very'' confused as to why a major rapper would be willing to open for ''Fall Out Boy'' on a lineup that also featured Music/AllTimeLow, Music/CobraStarship, Hey Monday, and Metro Station (though some people were ''very'' pleased he was replacing Metro Station on the dates he was scheduled for). Hollywood Holt's brief run opening for the band on the first two and last three dates of the Save Rock and Roll small venue tour was also confusing, but caused way more anger than 50 Cent ever did, to the point where he left the tour before the second to last show. Mind you, having a song about twerking and responding to nearly every negative tweet about him with even more negativity to the point of threateningly inviting those who tweeted their displeasure with him during the show to meet him at the merch table didn't exactly change minds about him.
** Patrick, what are you doing on [[https://www.youtube.com/watch?v=_Cy4Z1dXSZQ a Weekend Nachos song]] doing hardcore screaming? Ah well, at least you got it out of your system, dude.
*** Trohman also guested on "Hometown Hero" on that same album; ironically, that song was an ''extremely'' venomous attack on Wentz.
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