Top Definition
Large or (little) breasted mattress thrasher is a term that comes from the Greek words great in bed. L.B.M.T. is a word anyone can use and is great for the whole family. So start using it today!!!!
Man your mother looks like and lbmt (L.B.M.T.)

Guy 1:Shes really hot, I would want to bang her.

Guy2:Watch out I heard shes an lbmt (L.B.M.T.)
by Gare-bear!!!! October 22, 2009

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