What's (something) in aid of?

British & Australian, informal

something that you say when you want to know why someone has done something.

I heard the shouting from the other side of the building. What was that in aid of?

A present! What's this in aid of?

• have shit for brains
• have sights set on
• have sights set on doing something
• have sights set on something
• have someone by the balls
• have someone by the short and curlies
• have someone dead to rights
• have someone down on like a ton of bricks
• have someone down on you like a ton of bricks
• have someone in corner
• have someone in sights
• have someone in stitches
• have someone in the palm of hand
• have someone in the palm of your hand
• have someone in your corner
• have someone in your sights
• have someone on a short leash
• have someone on a string
• have someone on a tight leash
• have someone on hand
• have someone on hands
• have someone on the run
• have someone on your hands
• have someone over a barrel
• have someone pegged