English edit

Etymology edit

gut +‎ up, influenced by expressions like man up and shut up. Compare guts (courage).

Pronunciation edit

Verb edit

gut up (third-person singular simple present guts up, present participle gutting up, simple past and past participle gutted up)

  1. (intransitive, slang, chiefly imperative) To show courage and hide one's apprehension.

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