'FIRM UP' Phrasal Verb

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Definition of Firm up phrasal verb

Firm up

1. Make things clearer in a negotiation or discussion
   (Separable [optional] | International English)
   
   » Example: We need to FIRM UP some aspects of the contract before we sign it.
2. Exercise to make muscles harder and remove fat
   (Separable [optional] | International English)
   
   » Example: I go swimming every day to FIRM UP my body.