fuckmate in English dictionary fuckmate Meanings and definitions of "fuckmate" (vulgar, slang) A fuckbuddy, a friend with whom one has casual sex without commitments. noun (vulgar, slang) A fuckbuddy, a friend with whom one has casual sex without commitments. more Grammar and declension of fuckmate fuckmate ( plural fuckmates) fuckmate (plural fuckmates) more Sample sentences with "fuckmate" Declension Stem Try again Authors