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1. Go away; leave me alone. Usually used as an imperative. Beat it, little brother—I've got things to do. What are you kids doing on my lawn? Beat it!
2. To leave a place quickly. We need to beat it before the cops get here!
Inf. Go away!; Get out! Bill: Sorry I broke your radio. Bob: Get out of here! Beat it! "Beat it, you kids! Go play somewhere else!" yelled the storekeeper.
Go away, as in We should beat it before the food's all gone. This term is rude when used as an imperative, as in Stop pestering me-beat it! [Slang; late 1800s]
ˈbeat it(informal) (usually used as a command) go away: You’re not wanted here, so beat it.
exclam. Get out!; Go away! Beat it! I’ve had it with you.
To leave hurriedly.