Definitions by Hawtry

Throwing shapes 

Irish slang: acting aggressively (especially men) or someone who struts/walks in an aggressive manner

Acting aggressive - "your man was throwing shapes in the pub last night so I had to give him a few digs"
Mocking someone's walk - "state of your man - throwing shapes all over the place!" - is usually followed by an imitation of the way they walk

Throwing shapes by Hawtry July 28, 2020