One of the guys in my orchestra class always said "shut up freshman" whenever a freshman said something stupid
doing that in general is dumb and irrelevant
for example, and for the example, assume they weren't discussing anything dealing with what they called them:
"shut up woman"
"get out of the way, monday" (to someone who is actually black)
"quit it, handicap" (to someone who is actually mentally disabled)
"leave me alone furcigarette"
"what are you doing, friend" (to someone who is actually gay)
do any of these seem at all okay to anyone? I'd hope not