Considering how Gundam Wing's Zechs Merquise tries to cram every aspect of Char from every series he was in into a single-series character, he has been called "a Char fanboy" by some fans.
"Colonel Zechs, he is CHAR, and Relena, she is A SAYLA." Explanation
Relena is an expy of Sayla Mass, Char's younger sister.
From Endless Waltz: Mariemaia Khushrenada, she is A MINEVA.
The process known as the Bright Slap, used for "slapping the fail out of" a WangstyHumongous Mecha pilot, comes from the original Mobile Suit Gundam, wherein Bright Noa did just that to protagonist Amuro Ray. Mecha fans frequently express their desire to see this happen to whiny protagonists such as Kira Yamato or Shinji Ikari. Sadly, this is seldom employed in-show.
Shinji does get Bright-slapped in Super Robot Wars F and in SRW Alpha.
When he reappears in Alpha 3; he's 2 years older than when we last saw him, after the major Evangelion events. He's obviously grown a pair by simply fighting alongside the biggest badasses and hot-blooded Super Robot heroes ever. He DOES, however, yell at deliver a Bright Slap to Kira Yamato.
On yet another Gundam-related note, Acguy is love.
Does anyone even know how that one got started? Never did make any damn sense to me...
no idea, though it might be related to the fact that the Acguy is insufferably cute looking for a giant machne of death
Big head, stumpy limbs, plumb body. Indeed, that fit the quality of cuteness in Disney's book, like baby and hippo.
This has more or less achieved Ascended Meme status as of Model Suit Gunpla Builders Beginning G, where one of the main characters pilots a "Beargguy", an Acguy with a teddy bear-like head. Before you dismiss it as a simple coincidence, Beargguy is the only main mech on the show that isn't a Zaku or a Gundam.
In Japan, Beargguy is subject to a meme all its own: depicting him as Kuma, the 2chan equivalent of Pedobear.
Not to mention there is the original, "This is no Zaku, boy! No Zaku!" Explanation
Yelled by Rambo Ral at Amuro, who had at first assumed Ral's Gouf was a specially painted Zaku like Char's
In Gundam SEED Destiny, Heine, piloting the GOUF Ignited, yelled at Stellar, "This is no ZAKU, pal. NO ZAKU!!" Explanation
The Stellar vs. Heine duel in Phase 23 of GSD was a direct homage to the first Amuro vs. Ramba duel.
In the very first episode, Jerrid is introduced with the line "Kamille? I thought I heard a girl's name, but that's clearly a man." Cue Kamille going apeshit and punching Jerrid in the face. Keep in mind, at this point Jerrid is a complete stranger to Kamille, and is surrounded by other members of the Titans.
Norris Packard's "THATS RIGHT, COWER! BE AFRAID!" speech often gets put under a screen cap of a mobile suit pilot (or any gundam character) with an Oh Crap face, though the end of the speach is modified somewhat to fit the situation.
"No. No machine-gun for him. Shoot him down!" from the dub's first episode. Followed immediately by the pilot trying to shoot Heero down with a machine-gun. The original Japanese dialogue was more along the lines of "There's no point firing a warning shot. Shoot him down."
Who cares if Laura is a guy, I'd still hit it. Explanation
Let's just say that Loran looks really good in a dress.
Further explanation
Loran was originally supposed to be a girl protagonist. When this was shut down by the execs Tomino allegedly made him feminine and and put in those cross-dressing bits as revenge.
I know we're supposed to be done listing Gundam memes... but at this moment, Cagalli is crying her heart out!Explanation
Cagalli was known for crying throughout the first half of GSD, and Kira used that as an excuse on why he interferes in battles. Kira said that line in Phase 28 of GSD.
*Above thread gets Savioured* Explanation
Referring to Kira's one-sided defeat of Athrun, piloting his Saviour, in the same episode
Chairman Dullindal is Space Commie Naraku, and the Destiny Plan is space communism.
Nicol was fifteen! He loved the piano! Explanation
Athrun's explanation to Cagalli on why he "killed" Kira in their last duel, after Nicol took Kira's attack and sacrificed himself to save Athrun. Also, Nicol, being an expy of Quatre from Wing, loves music, and is a talented piano player and composer.
HA HA HA HA HA! You are too reliant on TV Tropes, there's no way you can list all the Memes here!
Saji Crossroad being some incredible badass seems to be a joke among the fandom, helped by the Gumdamn! podcast's Soul Bro Ryu naming him 'King Arthur' and declaring him 'his man'.
Tieria's seiyuu Hiroshi Kamiya is also known as the voice of Nozumo Itoshiki, from Sayonara Zetsubo Sensei, and during 00 Tieria picked up "Zetsubou-sensei" as one of his many, many Fan Nicknames. When Super Robot Wars Z 2 was announced, someone said this in response to a PV with Tieria in it, and the hilarity of the statement when taken out of context did the rest.
The left side is a screen-cap of grown-up Emily and Flit from episode 15. The right side, however, is a fan-work from Flit/Yurin shippers that show a grown-up Yurin with a much happier (and mustache-less) Flit on the right. Sadly, not all things are meant to be...
Among the rainbow of hair colors found in Gundam AGE is Mink Leiden's sky-blue hair. The fans played with this by editing the screen caps to show her hair flying away from the ship. Although given the way she parts her short hair, it does somewhat resemble the twitter bird...
Asem is better than a Newtype, he's a Supah Pairotto!Explanation
Asem's total lack of Psychic Powers makes him almost unique among Gundam protagonists, and he's encourage to become a "Super Pilot" by his mentor. The above bizarre spelling is what happens when the Japanese try to pronounce "Super Pilot".
Speculation on who pilots the Pirate Gundam in Generation 3's opening has mutated this into: Asem Asuno, Supah Pirato!
General/Miscellaneous
One more... when the Japanese Agriculture Ministry caught two of his employees editing That Other Wiki's Gundam page on company time, they issued the statement that Gundam does not fall under the purview of the Japanese Agriculture Ministry.
In a recent episode, Soul Bro was asked if there were any Soul Bro's Women. He replied that the qualifications were different for women - he only likes men wimpy. He likes his women to be BadassAction Girls, his favourite being Emma Sheen.
For Gundam AGE, Chris and Neo declared Dique to be Soul Bro's Man, over Soul Bro's objections.
Other Gundamn! memes include "Gundam 00 Season 2 sucked!" (not what they really believe, but mocking the trolls who claimed this), and "Gundam Unicorn does not exist." (Refusing to report on it while it was still an unconfirmed rumor, which trolls exaggerated into them claiming this)
"Zaku test" is derogatory slang for a pentester tutorial program that takes a very basic understanding to crack.
Wow... although it is the page quote, there is no actual mention of the "IT'S A GUNDAM!" down here.
Subverted quite amusingly in Gundam 00, with everyone from mooks to major characters uttering the infamous phrase or variants of it, and usually surviving.
Never fall in love with a gundam pilot, it will only end in disappointment (or an early funeral). Explanation
The Gundam series' penchant at Kill 'Em All endings of the main cast is infamous.
She even shared a similar nickname with Amuro, The White Devil.
The "Cardboard Box Gundam", which came from an extremely cheap (and bold) cosplay. Not that memetic here, but Big in Japan.
Mutated further when 00 came out, in which after Setsuna's catchphrase, many a fan art appeared of him wearing a cardboard box over his regular attire, with the word 'gundam' scrawled on the front of the box.