from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A brand of carbonated cola non-alcoholic drink produced by the company Pepsi.
- n. A portion (a glass, a can, a bottle, etc.) of Pepsi.
from the GNU version of the Collaborative International Dictionary of English
- proper n. Pepsi Cola; -- a familiar contraction.
From pepsin, the name of one of its ingredients. (Wiktionary)