When you see a man/woman and decide you could have sexual relations with them, regardless of their personality or physical appearance.
Maria: Theo is such an ass whole.
Annie: Yeah, but he is like a 10 - he's instafuckable
Maria: That's true - get on that!
by JMcMahon December 4, 2011
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a describing word for a guy/girl you would fornicate with, without any hesitation. One glance, fuck me. That simple. Can also be used as exclamation.

Instafuck can NOT be used as a verb (See Instafucker).
A: Did you see Justin Timberlake in The Social Network?
B: Hell yeah, instafuck!

*hot girl walks by*
INSTAFUCK!
by ED3ers March 2, 2011
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What you can say if you see a hot girl that you would want to have relations with immediately.
"Man, that girl is Hot!"
"Hell yeah, I'd instafucker"
by DJ @WP February 9, 2006
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a term used for good smelling cologne that makes girls want to fuck the guy instantly
Matt's instafuck was so orgasmic that i wanted to fuck him the second i smelled him.
by sadie paradise January 5, 2008
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A combination of the words Instantly and fucked. Spelled either way Insta-fucked or Instafucked. Used primarily when one is about to be or is fucked.
We are totally are Instafucked aren't we?
by Chloe Sakuna July 22, 2008
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