noun, noun or participle which takes 'suru', intransitive verb
quitting while one is ahead; running from a rematch after winning
Often used in games or competitions when the winner refuses a rematch or leaves immediately after winning, sometimes with a negative connotation of avoiding a fair rematch.
彼は勝ち逃げして、もう一戦しようと言わなかった。
He quit while he was ahead and didn't ask for another match.
勝ち逃げ
Some people think that running away after winning is cowardly.