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A combination of fantastic and orgasmic/orgasm.
Its meant to overly stress how great or wonderful something is.
If the Steelers win the super bowl that would be fantasm!
by Pixxiedame February 14, 2011
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Aug 11 Word of the Day
You can tell by the way she walks, she got that WAP.

You can look at her face and tell she ain't got that WAP.
by Black Don August 06, 2020
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2
A fantasm occurs when one ejaculates (most likely while being felated) while simultaneously passing a log.
"I just had a phantasm, and let me tell you, it was something else."
by Chris March 14, 2005
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3
verb; to experience a fantasy, usually used in conjuncture with broken English.
"every night i fantasm on girls"
by Jasper Gilispie April 25, 2010
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