To lose an erection, ruin a potential sexual opportunity or potentially happy moment.
Guy 1: My girl was about to give me oral by the fire when her roommate came home.
Guy 2: Did she keep going? Did the roommate join in?
Guy 1: NO! She was embarrassed and asked me to leave.
Guy 2: What a boner buster!
by RNPS April 29, 2008
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