To be under suspicion or implicated, whether truly or allegedly, in illegal or forbidden activities. (This expression was common during the Trujillo dictatorship to describe people targeted by the regime for political dissent).
A party crasher, a person who shows up to a party or event without an invitation (literally a parachute, describing how the person just drops into the gathering).
Someone who listens intently to a conversation they are not part of, often appearing to hang on every word or eavesdrop. They might eventually try to join the talk, but they are usually scolded for being nosy or intrusive (literally translates to mouth eater, referring to the way an eavesdropper might stare at a speaker with their mouth open while listening).