sling one's hook verb1 •(informal) To leave, depart, especially if forced to do so.‘I don’t want none of your apologies, and I don’t want none of you neither; I don’t like the looks of you, and so I tell you. Before I let anybody into my house you’ll have to sling your hook.’ — 1897 formsslung one's hook · slinging one's hook · slings one's hook