Verb- the act of dry heaving. Pre- throw up
Person A: *weird coughing noise*
Person B: “Hey don’t gag up on me! This is a new shirt!”
The implication that someone is gagged, that being they have a piece of cloth, towel, or bandanna tied in their mouth preventing them from talking; usually the person is also tied up.
Judy was gagged up by the armed robbers.