Giant mechas giving their opponents the "finger"
"I once caught a fish THIIIIIS BIIIIIIIG"
Mechs with sign "I'm with stupid" with arrow pointing at pilots cockpit
"Hey! Watch me put this flamethrower at my steel ass!"
A cockpit complete with coffee machine, cup holder, hanging dices, good air-conditioning, BBQ grill, poster of Ayumi Hamasaki, & other needless but essential stuff.
Giant mechas doing the Staying Alive salute
"How's my mech-ing? Call 1800-EAT-FOOT"
"You know, that (insert hero) is one mean mecha----!"
"Shut yer mouth!"
"Hey, I was only talking about (insert hero)"
"We can dig it"
"Oops! Wrong target!"
"Oops! Wrong planet"
"Oops! Wrong mecha!"
"Oops! Wrong anime!"
Playing ball with severed mecha-head
"Hey, babe. You wanna come up my mech & see my cockpit?"
Spam. Just saying Spam.
Giant mecha poke opponent mecha's eye, Three Stooges style.
"Yo, Shinji! You're ass's on fire"
Giant mechs "Play that Funky Music, White Boy"
"I like pie"
Mecha marching in formation to the tune of Ride of the Valkyries.
"Pull my finger"
"Say hello to my little friend!"
Any more ideas?
