2 definitions by HCTKPR

Top Definition
When you see something or feel something that causes one or more of your senses to orgasm.
Guy 1: *Sees extremely hot girl* *Insta-gasm*

Guy 2: *Eats bacon* *Insta-gasm*

Guy 3: *Hot drunk girl falls on top of him* *Insta-gasm*
by HCTKPR July 17, 2011
A hot girl who listens to rock music and has the appearance of such. Can also be a hot girl that only appears to listen to rock.
Guy 1: HOLY SHIT DID YOU SEE THAT NUGGET WALK BY!!!!!1

Guy 2: OMG YEA I GOT AN INSTA-GASM!
by HCTKPR July 17, 2011
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