Abbriviation for "You bore me" used online.
*person talking about some confusing Physics stuff*
Another Person: YBM
Three letters that stand for the secrecy of the sisterhood of the sorority of KAPPA ALPHA THETA. Sisters use these three letters to sign notes, or to say outloud when they feel it applies to the situation.
Theta Love YBM! Bettie
"Thanks so much youre so YBM!"