Wiktionary
one up
alt. (context idiomatic English) To outdo, to do something slightly better than a competitor's prior effort. n. (context video games English) An additional life or object that gives the player an extra chance to play. vb. (context idiomatic English) To outdo, to do something slightly better than a competitor's prior effort.
Usage examples of "one up".
They kept all the shit for me, cooking, washing dishes, until I busted one up who asked me to wipe his ass.
In a nearby ravine lay hundreds of empty Busch cans older than Gillian, who picked one up and studied it as if it were an archaeological treasure.