mating mark

noun2

1. •
   In speculative erotica, a scar or mark on a person's body signifying their permanent bond to another, typically the result of a bite.

   • Especially not after seeing a mating mark on Wilder's shoulder. — 2017
2. •
   (rare) A lasting mark or wound sustained during copulation in certain species.

   • The male crab observed in this study did not have mating marks prior to picking up the female. — 1966