A shortened version for "fat upper crotch area". Fuca is usually used as a plural form of a group with both genders. Fuca may also be used for a single person, if they are confused as to what gender the fuca is.
Renata: Man look at that guy over there...he definitely could lose a few pounds.
Alexsandra: Really? Cause I think his fuca looks damn sexy. Imagine trying to actually find a penis in that...Mission Impossible 5.
Acronym: “Friends Ultimately Come Around “. Meaning: “time heals all” . “Friends drift apart but come back together for common interests” . “People come and go - but friends always find each other”
American Football: meaning: teams and fans alike stick together
Team moved to another city, “no worries FUCA they will will come back”
Friend doesn’t like a certain venue, “give it time, FUCA”