Definition of cover one's/someone's asschiefly US, informal
- I wish he'd admit to his mistakes instead of always trying to cover his ass.
: to guard from attack
: to have within the range of one's guns : command
: to hold within range of an aimed firearm
: something that protects, shelters, or guards: such as
: natural shelter for an animal
: a position or situation affording protection from enemy fire
: some person : somebody
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