- Date 1999, pronounced 'ouost. Noun, interjection, colloquialism, adjective.1. Literal: short for Usted (or you, in Spanish), which is a short version of the phrase You stop it!2. Noun: Post facto expression to describe effeminism, saucy, swishy, or swashbuckling.3. Interjection: Ust! An expression of the previous definition.
When somebody says something such as Is this shirt too pink on me? you reply, Ust!
Dictionary of american slang with examples. .