Byfsismcdab is the short form of "Bitch you fucking stupid idiot suck my cock dumbass bitch", it is the highest form of
insult possible, use it on
someone while aruing to get the upper
hand.
Dude 1: Uh Hu? WELL UR MOM IS FAT
Dude 2: Ok and?
Dude 1: NO ONE ASKED
NOOBDude 2: Shut up Byfsismcdab
Dude 1:
OMG UR SO SMART IM SO
DUMB I HAVE NO IDEA WHAT TO SAY BACK TO THAT
*Dude 1 Has Left The Chat*