get (your) arse in gear

very informal!

to force yourself to start working or to hurry.

If she doesn't get her arse in gear she'll be late again.

• in a tight spot
• in a vacuum
• in a way
• in awe
• in awe of
• in awe of someone
• in awe of something
• in a word
• in bad faith
• in bed with
• in bed with someone
• in birthday suit
• in black and white
• in blood
• in brief
• in broad daylight
• in broad strokes
• in cahoots
• in cahoots with
• in cahoots with someone
• in case
• in case of
• in case of something
• in charge
• in charge of