mousetache mouse-tache noun An unshaved growth of hair on the upper lip that resembles a rodent SEE ALSO: mohawk Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Tumblr (Opens in new window) Tumblr Share on Pinterest (Opens in new window) Pinterest Share on Reddit (Opens in new window) Reddit Email a link to a friend (Opens in new window) Email Like Loading... Related