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The unwritten scale on how likely some one is to get boned. More commonly used towards women.
Guy 1: "What do you think her bonerability is?"

Guy 2: "I give her an 8."
by Haseo14 March 06, 2011
(adj) - a measuring tool used to describe how likely a woman is to give a man a boner
Amanda had a 5% bonerability. Sandra on the other hand, was rocking 75% bonerability.
by Dr. ^.^ June 09, 2010