noun, slang ·Uncommon ·College level

Definitions

Noun

1. 1
   The residue left upon the upper lip area after drinking milk, a milkshake, foamy coffee, etc. informal

Synonyms

All synonyms

milk moustachemilk mustache

Etymology

Blend of milk + moustache.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.