It is a Brazilian word, largely used throughout Brazil. It is highly derogatory and applied to someone who is not trustful and weak. Arrombado
literally means a bank safe which has been violated. It is applied to
homosexual anal sex, meaning the passive man had his anal orifice enlarged by sexual penetration. That is the meaning intended. Notice that among friends
people may use those terms as jokes, and not really seriously, Brazilian culture is about nuances and intonation.
A - Joao is an arrombado, he failed to come to work today.
B -
Hi, you
fucking arrombado, I am going to make you
kiss the floor if you ever say this again ok?