We're being really childish at work and trying to come up with insults...but they CAN'T involve swearing...Stuff that you used to say when you were little, or things like 'go play in the road', 'take a long walk off a short pier' and other such incredibly mature phrases. Ta Sam-x
we're you born stupid or do you practice?
or "when you were born the midwife slapped your mother. Or the variation on ugly, "someone took a dip in the ugly pond.
you're so spiteful you would put a blind man in a round room and tell him his dinners in the corner or you're so thick you'd starve in a supermarket and yo moms so fat she sets of car alarms when she walks down a street you're so snide you would hang a one-armed man off a cliff wits an itchy bum and (last one) yo moms so stupid she thought a set of traffic lights were a disco
Said recently (not by me) of a colleague:
"You could lock him up naked in a round, unfurnished cell with two ball bearings; he'd manage to lose one and break the other".