Get a leg up

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Meaning: To get a boost or advantage.

Example: I could get up a 5:00 am to get a leg up on my competition, but I don't think so.

Origin: This phrase may incorrectly invoke images of a dog raising its leg.

In fact "Getting a leg up" is from the act of an equestrian receiving help in mounting a horse.

The helper would create a foothold by cupping the hands to heft the rider upward, throwing a leg up and over the steed.