—n. 1. the flesh of a cow, steer, or bull raised and killed for its meat.
2. an adult cow, steer, or bull raised for its meat.
3. Informal. a. brawn; muscular strength.
b. strength; power.
c. weight, as of a person.
d. human flesh.
4. Slang. a. a complaint.
b. an argument or dispute.
—v.i. 1. Slang.to complain; grumble.
2. beef up, a. to add strength, numbers, force, etc., to; strengthen: During the riots, the nighttime patrol force was beefed up with volunteers. b. to increase or add to: to beef up our fringe benefits.