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Someone whom has had sexual relations with a person whom you have also had sex with.
O me and lisa go way back we both were shagged by giles so we are fuck in laws too.
by Sirus May 15, 2003
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Jul 28 Word of the Day
to sport a boner, fly the sail at full mass, rock hard, etc.
"I had a lot of cartoon characters that used to get me sexually aroused as a kid... The female reindeer from the Rudolph claymation series, when I was in preschool, I used to be bricked up watching that shit." -Jack Harlow
by real_philly February 11, 2020
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The relationship you have with anyone that has already had sex with the person you’re currently sleeping with.
Bob banged Susan at that party last year, guess that makes us fuck-in-laws.
by Sigar Cel November 25, 2003
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