Dictionary / Vocabulary / 勝ち逃げ
かちにげ
quitting while one is ahead; running from a rematch after one has won
「あの、かりんさん・・・、そろそろお開きにしませんか？」「駄目、勝ち逃げ禁止！今度こそボクが勝つの！」
"Er, Karin ..., shouldn't we call it a night soon?" "No! No quitting while ahead! Next time I'll win for sure!"