Simple past tense and past participle of beef.(verb)
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Use "beefed" in a sentence
"Quanell and about 150 people who attended the address call the beefed-up policing program an "abuse of black people.""
"Harris says she's noticed a stronger presence from school security and police, part of what the school security officials call a beefed-up random security enforcement program."
"Republicans even want to cut funding for the kind of beefed up regulation of securities and derivatives markets that would have prevented the last financial crisis."