opportunist
adjectivemasculine/feminine/ɐpɾuvɐjˈtɐ̃tɨ/medium
a·pro·vei·tan·te
Definition
That or the one who takes advantage of a situation, especially in an opportunistic way.
He is an opportunist who only shows up when he needs something.
I don't like his opportunistic attitude towards other people's work.
Etymology
De 'aproveitar' + sufixo '-ante'.