culos

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

Culos

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