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
1 more definition
the scottish version of skid mark. It' sthe little shit stain you may find in the seat of your underwear after a rigorous session of pinching white castle sliders and not geting all the little pueblos.
"you've a fucking squidmark, go wipe your bottom!"
by so sayeth the lexicon October 03, 2003