Top Definition
Semi erect penis following sympathetic embrace with girlfriend.
Girl: It's so traumatic, mum selling my childhood home.

Boy: Don't worry darling

*embrace*

Girl: Oh my god! Have you got a boner?!

Boy: Darling, it's a sympathy semi!
#boner #semi #hardon #sympathy #erection
by Prahan Pirate November 08, 2013
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