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1.
an erection that occurs after a hunter sees a turdy-point buck on his deer-cam and posts it all over facebook.
"check out this buck on my deer-cam, i got such a deerection when I saw it"
by bigsexy242424 November 13, 2011
 
2.
when a penis withdraws completely into the body of the male, much the way a tortoise retreats into it's shell during times of fear
There was a point of time when Lindsay's lovely bosoms hoisted my flag, but now here anorexic body gives me a de-erection
by Harry Pudi December 27, 2006