Top definition
A Necessary Fuck. One that is required either arising out of circumstances beyond the control of the participants or due to an extreme sexual attraction that can only be settled with a good toss in the sack.

Etymology>>> Sex ( the act of penetration) + essary (required or obligatd)
This girl is so hot, its about to get sexessary.
by Truth is not an ideal, either September 22, 2011
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