A band created in 2004 by childhood friends Ryan Ross (guitarist/main songwriter), Spencer Smith (drummer), and Brent Wilson (bassist), and later, joined by Brendon Urie (lead singer) and Jon Walker (who replaced Brent in 2006). They were discovered by Fall Out Boy's bassist Pete Wentz and signed to his vanity label, Decaydance.Their name comes from a line in the song "Panic" by Name Taken, but due to the relative obscurity of this reference, the band usually cite "Panic" by The Smiths, which contains the line "Burn down the disco" in its chorus and is more well known.They are known for their quirkyfashion sense, rampant stage gay antics, and longer than life song titles. Popular songs include "I Write Sins Not Tragedies", "The Ballad Of Mona Lisa", "This Is Gospel", "But It's Better If You Do", and "Lying Is the Most Fun a Girl Can Have Without Taking Her Clothes Off".As of July 2009, Ryan Ross and Jon Walker are no longer members and have formed their own band, The Young Veins.As of 2011, the band has two replacement members, Dallon Weekes (bassist, formerly from The Brobecks) and Ian Crawford (guitarist, formerly from The Cab). In 2012, Dallon Weekes officially joined the band.They're often grouped as part of the "Fueled By Five" (five bands from their label, Fueled By Ramen), which also includes Fall Out Boy, The Academy Is, Gym Class Heroes, and Cobra Starship.
Butt Monkey: Brent Wilson is this among many fans, who are fond of telling jokes about him working at a McDonald's now that he's not with the band and/or various sarcastic comments saying they love him and are big fans.
Fan Nick Name: Brendon: Bden and Brenny Bear. Ryan: Ryro and (by his detractors) Ryho. Jon Walker: Jwalk. Ian Crawford: Een.
Faux Yay: The tradition began with Ryan and Brendon and has continued with Brendon and Dallon. Features anything from intentional Almost Kisses to simulated blow jobs. Makes up one-third of their act, to the delight of fans.
Keet: Brendon might well be the poster boy for this trope.
Mr. Fanservice: Brendon is a major one, as it isn't at all at common for him to take his shirt off onstage and it's made abundantly clear by the video for Girls/Girls/Boys, where he spends the entire video naked. A couple of the other members can also be this to an extent.
Promoted Fanboys: The guys were huge fans of Fall Out Boy, and followed Pete's livejournal before sending him a sample of their music and ultimately getting signed to his label. Brendon has also been featured on Fall Out Boy songs multiple times
Spell My Name with an S: Panic! At the Disco vs. Panic at the Disco.note The band omitted the exclamation point during Pretty. Odd. but it's since returned and it's use is considered the proper way to write the band title.
Stage Names: Ryan changed his name from George Ryan Ross III, and Spencer from Spencer James Smith V.
Actually, the V is probably not really in Spencer's name, but got tacked on by fans because of his Wikipedia page.
The Teetotaler: Ryan and Spencer, when the band started. Reason C (Ryan's dad). Kind of Harsher in Hindsight in Spencer's case, as of 2013 he went public about his substance abuse problems.
The Cast Showoff: Dallon Weekes actually designed the cover art for Vices and Virtues  and is a pretty skilled artist. This was a bit subverted though, because it was rarely mentioned.
Walking Shirtless Scene: Brendon taking off his shirt at one point is almost happens once a concert, he's also shirtless in MANY of his Vines. He even posted a vine where he sings about not liking to wear shirts (warning: video contains NSFW language)
Album Title Drop: "Things are shaping up to be pretty odd." (Notable as this is the only time the band has done this)
All There in the Manual: The lyrics that come with A Fever You Can't Sweat Out expand on some of the songs, for some reason.
They ended up... well, making love isn't exactly what I'm looking for. But. You. Get. The. Picture.
It's part that and part What Could Have Been. The lyrics booklet for Fever has all the original lyrics that were written for the songs, not what's actually on the album, which results in things like the above.
Continuity Nod: The opening of "The Ballad of Mona Lisa" music video has multiple nods towards the video for "I Write Sins Not Tragedies". This includes the view of church pews, the focus on Brendon's hat, and of course "closing the goddamn door".
The clocks in the same video are all set to nine o'clock.
So is the big one in "Ready To Go".
In the music video for 'That Green Gentleman,' near the end, a group of old men appear dressed up like the band did for 'A Fever You Can't Sweat Out'
New Sound Album: Pretty. Odd., causing the Broken Base. Vices & Virtues was more in line with A Fever You Can't Sweat Out however.
Too Weird To Live, Too Rare To Die is roughly 90% dance pop, with techno and dubstep influences, and a complete departure from anything they did before, barring "New Perspective". The closest song to any of their previous sounds is the piano and string ballad "The End Of All Things".
Non-Appearing Title: All of the songs on A Fever You Can't Sweat Out, but seen less and less with each successive album. Brendon has said this is because he had a hard time remembering the titles of the songs.
Reality Subtext: "This is Gospel" was written by Brendon as being about Spencer's drug addiction. Knowing this can turn it into a bit of a Tear Jerker, especially because Brendon admitted to crying while recording it.
Revolving Door Band: Notable because they've never had the exact same official line-up for any two albums.
Siamese Twin Songs: "We're so Starving" and "Nine in the Afternoon," but the latter is usually played by itself.
"Time to Dance" is interesting because if you haven't read Invisible Monsters, it seems like a song about teen pregnancy, and some of the lines that reference it seem to have little meaning in the scheme of the whole song (namely "hiding in estrogen and wearing aubergine dreams"). Brilliantly done double meaning.
"Lying Is the Most Fun a Girl Can Have Without Taking Her Clothes Off" and "But It's Better If You Do" are references to the movie Closer- spoken in the same breath, no less.
"The Only Difference Between Martyrdom and Suicide Is Press Coverage" comes from Palahniuk's Survivor
"London Beckoned Songs About Money Written by Machines" has a bridge which references lines from Palahnuik's Diary ("just for the record, the weather today..." is a reference to a line the main character often says), and the title references the Douglas Coupland Novel Shampoo Planet("Torrid tunage from London beckoned- songs about money written by machines.")
This one may be unintentional, but the title also references Pink Floyd three times; the band is English, and they have songs titled "Money" and "Welcome to the Machine".
"I Write Sins Not Tragedies" also refers to Shampoo Planet ("I am writing a list of tragic character flaws on my dollar bills with a felt pen. I am thinking of the people in my universe and distilling for each of these people the one flaw in their character that will be their downfall—the flaw that will be their undoing. What I write are not sins; I write tragedies.")