When you get a incredibly rock hard erection. Sometimes in the morning or when you’ve become turned on by something a bit kinky like an older lady whose showing a lot of cleavage.

Sometimes referred to as a ‘stonk on
I’ve got a right stonker in my underwear after seeing her milf tits wobble in her low cut dress

I’ve got a stonk on and I need to knock on out.
by Muckyfingers82 June 3, 2022
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British Informal Slang

An erection or any other sign of sexual arousal.
Blimey, that singer gave me a real stonker!
by Retrogradesheep April 10, 2014
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Derived from the Latin word for erection, "Stonker" is used widely to describe a male's erect penis.
Mark has a stonker.
Mark has a stonking hard-on.
by Bob February 23, 2005
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this is the stinkiest fart that is ever possible. there is nothing worse than getting a whiff of a stonker. some say hittler used stonkers as his most effective weapon in the second world war.
for more effect, they can be called eggy stonkers
guy 1="awhhh sickkkk that guy just did a serious stonker"
guy 2= "thats one eggy stonker"
by mokeykenlon May 8, 2008
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Brit: Said of something that is good, or exceptional.
Young Jimmy put in a stonker of a performance at the final of the football soccer and scored four goals.
by Dan Fox July 18, 2003
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Past tense of 'to stonker'. Meaning to destroy someone during sexual intercourse leaving them unable to walk.
"Y'know Adam? Well, he was upstairs with Jennifer last night and he absolutely stonkered her!"
by BuffaloJoe1 May 11, 2015
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