YIB stands for 'Youth In Black'. a gang of 'chavs' dressed in black balaclavas, hoodies and/or tracksuits.
by seeingisbelieving March 26, 2012
Get the YIBmug. "Yours in Brotherhood"
A way for fraternity brothers to close correspondence with another brother, most often in email.
Possibly an imitation of Scouting's common use of "YiS" for "Yours in Scouting".
A way for fraternity brothers to close correspondence with another brother, most often in email.
Possibly an imitation of Scouting's common use of "YiS" for "Yours in Scouting".
by term3 October 26, 2010
Get the YiBmug. 
by Plogg June 3, 2004
Get the yibmug. by Rickytricky December 12, 2017
Get the YIBmug.