Scalia:

• your mama’s so stupid, she raids elemental
• your mama’s so fat, her 225 riding skill cost 2,000g
• your mama’s so fat, the Amani War Bear rides her
• your mama’s so fat her gnome mage has clipping issues
• your mama’s so fat Magtheridon looked at her and said “Not Again…NOT AGAIN”
• your mama’s so fat, she has Plainsrunning as a racial skill
• your mama’s so fat, she loses two bag slots for her ass
• Your mama’s so fat, her racial skill is immunity to knockback effects
• your mama’s so fat, people target her instead of the Ice Lord in AV
• your mama’s so fat, she could solo Gruul up to 25 grows
• your mama’s so fat that when a DK uses Death Grip on her he gets pulled across the room
• your mama’s so fat that the first time she ported to Dal the city crashed back to earth
• your mama’s so easy, she’s exalted with Booty Bay and Bloodsail Buccaneers
• your mama’s so fat it took two Molten Giants to tank her
• Your mama’s so fat, she hacks so she can carry a whole bag full of Mage Table food

Kingfox:

• Your mama’s so fat, Garr flew when she blew up.
• Your mama’s so nasty, Festergut thinks she smells.
• Your mama’s so fat, she hits the LFG button and arrives at the instance alone.
• Your mama’s so fat, her deathknight can only wear cloth.
• Your mama’s so fat, she used the sunwell as a footbath. And now it needs to be purified again.
• Your mama’s so nasty, Nat Pagle gets excited when she walks into town.
• Your mama’s so skanky, she was the original cavern of time.
• Your mama’s so nasty, she gets AV AFKers to leave the tunnel.

Hoppychris:

• your mom’s so fat she got an achievement for managing to stand up for a bio break
• Your mama’s so fat, her right arm ends up in a different instance than her left arm.
• your mom’s so fat, she gets a backpack, 2 pouches, and 5 folds to carry stuff in
• your mom’s so easy she earns reputation points just for being somewhere
• your mom eats so much she has 2 mages following her around all the time
• yo mama’s so fat she’s soloing Ahn’Qiraj hoping that a grimoire of atkins drops

Snaarg:

• Your mama’s so fat, she gets her own zone in cataclysm
• Your mama’s so fat, she looks to abominations for thinspiration
• Your mama’s so ugly, she uses her face as a special attack
• Your mama’s so fat, king mosh runs from her footsteps
• Your mama’s so easy, Garrosh wanted her as a faction in the Horde
• Your mama’s so fat, the Princess in Maradon was her skinny college roommate
• Your mama’s so fat, she thinks dual-wielding chicken legs is a good DPS combo
• Yo mama’s so fat, she has weight watcher’s as an offspec
• Yo mama’s so fat, she gears for grease

ETA: Whoops, looks like someone’s already doing this. I salute you, wowyomomma.