Top Definition
To legitimize a marriage by have anal sex for the first time.
"Hey did you and Mary constimate the marriage yet?" "Yeah man she couldn't poop for hours after."
by SemiNation October 18, 2014

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to get with, date
(constant + mate = constimate)
Girl One: Nicole, you and him should really constimate! You are so cute together!
by xnicole123 September 20, 2011

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