Top Definition
An erection you consciously attempt to achieve in order to be polite and/or appreciative to a woman. Typically in response to an unattractive naked woman, or an inartfully executed handjob, it is an attempt to spare her the insult of a flaccid penis.
The girl in the hot tub was pretty fat, but since she'd taken her top off I tried to work up a courtesy boner, you know, to be chivalrous.
by RecoveringFratboy January 03, 2009

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