The difference between Big up and Pump iron
When used as verbs, big up means to increase one's muscle mass through exercise, whereas pump iron means to lift weights.
Big up is also noun with the meaning: significant respect or acclaim.
check bellow for the other definitions of Big up and Pump iron
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Big up as a verb (British, slang, idiomatic):
To increase one's muscle mass through exercise.
Examples:
"He works out every day to big up himself."
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Big up as a verb (Jamaica, slang, idiomatic):
To proclaim or exaggerate the importance of.
Examples:
"I want to big up my bro on the mic."
"They're trying to big themselves up to be more than they are."
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Big up as a noun (slang, also '''[[big ups]]'''):
Significant respect or acclaim.
Examples:
"I want to give a big up to my bro on the mic."
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Pump iron as a verb (idiomatic):
To lift weights; to engage in weight or strength training.
Examples:
"Her upper body strength has been improving since she started pumping iron at the gym."