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aid and abet
aid and abet
To assist someone, usually in a mischievous or illegal activity. Gary was arrested and charged with aiding and abetting the jewelry thief. I know other kids aided and abetted Paul in egging our house—he's just the only one who got caught.
aid and abet someone
Cliché to help someone; to incite someone to do something, possibly something that is wrong. (Originally a legal phrase.) He was scolded for aiding and abetting the boys who were fighting.