oof slang

Vimes plunged forward, kicked as hard as he could, and heard an 'oof' of expelled breath.

There was an 'Oof!' of expelled air as the man fell to his knees, his broad shoulders heaving as he strained for his next breath.

It was plain the years were telling on this energetic pair, and while they enjoyed the quick work with the fingers, "paddin' the 'oof," which is walking, was beginning to bear heavily upon them.

Locke hadn't even stepped inside, merely approached the door after failing to spot anyone he could easily bribe for an audience with Selendri- 'Oof,' he said as the ground made his acquaintance.