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The act of pulling out of your partner before cumming while doing them doggy-style and then hitting him or her in the back of the head with your jizz.
Randy and I were having sex last night and he came so hard he JFK'ed me when he pulled out.
by Arcadia Fallon October 18, 2011
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when a girl is giving you head and right as you are about to blow your load you pull her head down with extreme force blowing it right in the back of her head
sara was giving jeff a blow job and he jfk'ed her
by pickle puss April 01, 2006
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when a chick is sucking you off and she gets off as you are about to cum and it flys and gets you in the head/face/mouth area
she totally JFK'd me last night and i needed some mouthwash
by velcro kidneyz February 17, 2008
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"sir i see jfk should i take the shot "
"yes"
"mega PEW"
"dead boi"
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A new hip acronym! Stands for Just Fucking Kidding!
Dude..you totally just slept with my girlfriend last night!!

Dude: WHAAT?!!

JFK!
by NikiWithOneK April 23, 2012
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To take a daily, twenty minute nap.
I need to catch you after my JFK.
Where are you going? Duh, to JFK.
Improve your health when you JFK.
Chill, take your JFK.
Say word, JFKit
by kpeedy March 25, 2008
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55
Just Fucking Kidding

When you make a joke and some wasteman takes offence to it, completely killing the atmosphere.

So you say 'JFK'.
(homeboy) What do a silver medallist and a priest have in common?

(homegirl) I don't know.

(homeboy) They both came in a little behind.

(wasteman) pedophilia isn't funny

(homeboy) JFK
by ellensmells February 26, 2014
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