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After sex, that boner that you keep for about a minute or so after. Can lead to zipper problems.
Alyssa gave me an awesome blowjob, but afterwards I hurt myself when my fly got caught on my afterboner.
by soccerfreak5 February 16, 2010
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the boner you still have after masturbating or having sex before going flaccid. It usually lasts a minute and makes it hard to put clothes on.
Franklin tried to piss after sex, but his afterboner made pee go everywhere.
by gamervolcano May 04, 2015
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