godan verb (-su), transitive verb
leave unfinished; abandon; leave hanging
Colloquial transitive verb meaning to leave something half-done, abandon a task, or neglect to finish something. Often implies a casual or irresponsible attitude.
宿題をうっちゃらかして遊びに行った。
I left my homework unfinished and went out to play.
He abandoned his work and went off somewhere.