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beef

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1beef/ˈbiːf/noun
pluralbeefs
1beef
/ˈbiːf/
noun
pluralbeefs
Learner's definition of BEEF  
[noncount]  : meat from a cow — often used before another noun
[count]informal  : complaint
[noncount]informal  : muscles
2beef/ˈbiːf/verb
beefsbeefedbeefing
2beef
/ˈbiːf/
verb
beefsbeefedbeefing
Learner's definition of BEEF  
[no object]informal

beef up

[phrasal verb]
beef (something) upinformal or beef up (something) 
: to add weight, strength, or power to (something)
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