"bae"
any type of variation of "I dont care"
"... your mom in bed last night" or something like that.
"I'll hack you"
"SWAG"
"suck my richard"
"noob" (especially when the BL_ID, date, or anything is anything after when you joined)
"wow you suck"
and some others but this will last for ever.
honestly, any of these make me want to smash their heads with a frying pan
or a rolling pin.