turn up

To show up; to appear suddenly or unexpectedly.

"I don't like people turning up without an appointment."

To cause to appear; to find by searching, etc.

"I spent hours in the archives, but couldn't turn up anything on the alleged criminal."

To increase the amount of something by means of a control, such as the volume, heat, or light.

"Turn up the radio and sing along."

Fabric turned up at the bottom of trousers to make them shorter.

"Why does all this fluff acumulate in the turn-ups?"

A fight or disturbance.

The next card taken from the top of a pack of cards and displayed.

"I'll bet $10 that the next turn-up is an ace."