reset marathon; rerolling
Gaming slang for repeatedly restarting or reinstalling a game, especially mobile gacha games, to obtain a desired character or item from the initial free pull.
wasei-eigo (Japanese-coined English), from reset marathon
I did a reset marathon on the new social game and pulled my favorite character.
リセットマラソンに時間をかけすぎて、まだ本編を始めていない。
I spent too much time rerolling and still haven't started the main story.