Question: what is the meaning of idiom turn up?
Answer: turn up. 1. To increase some aspect of something, such as its volume or speed. In this usage, a noun or pronoun can be used between "turn" and "up." Can you turn up the volume on the TV? ... In this usage, a noun or pronoun can be used between "turn" and "up." I turned up the cuffs of my shirt before washing the dishes.