Is the Spanish slang for FWB
Ana is my culo we are hanging out tonight
Ana and Michael are culos, they are nothing serious is just to fuck around
slang in Spanish to call someone that you are friends with benefits with, but you haven't established your relationship yet.
Sammy: how's everything with tom going?
Tracy: idk we haven't established our relationship yet.
Sammy: if you haven't established your relationship yet, you are culos.
Tracy: you are right, I didn't realize