A mark often left on the front of a pair of underwear, usually the result of leftover male ejaculate.
After a pleasurable night of adultery with my wife's sister, the only evidence that got me busted was a couple of overlooked squid marks on my boxers, and her dress.
by Briggsyl March 30, 2008
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"Check out the squid marks on that guy! That is some serious ink!"
by Fatty Bearsteak September 11, 2019
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