1 definition by Bettie Locke

Top Definition
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

or

"Thanks so much youre so YBM!"
by Bettie Locke January 30, 2007

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