[pep-ee] /ˈpɛp i/

adjective, peppier, peppiest. Informal.
energetic; vigorous; lively.
adjective -pier, -piest
(informal) full of vitality; bouncy or energetic

“full of pep,” 1915, from pep + -y (2).


Energetic; vital; zingy (1918+)


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  • Pepsi-cola

    U.S. patent filed Sept. 23, 1902, by Caleb D. Bradham (1867-1934), pharmacist and drugstore owner of New Bern, N.C., probably from pepsin; early Pepsi ads tout it as a digestive aid.

  • Pepsin

    [pep-sin] /ˈpɛp sɪn/ noun, Biochemistry. 1. an enzyme, produced in the stomach, that in the presence of hydrochloric acid splits proteins into proteoses and peptones. 2. a commercial form of this substance, obtained from the stomachs of hogs, used as a digestive, as a ferment in the manufacture of cheese, etc. /ˈpɛpsɪn/ noun 1. a […]

  • Pepsin a

    pepsin A n. The principal digestive enzyme of gastric juice that is formed from pepsinogen and catalyzes the hydrolysis of peptide bonds to form proteoses and peptones.

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