1. Used when something is too hardcore to be called hardcore and must move up to an even better word.
2. Also to be used when you see a man (or ugly woman) with an intense mustache that likes, preforms in or is at at super duper hardcore show.
fag: fo sho!
2. another cool d00d: hey i saw this guy at mcdonalds wearing a liferuiner shirt and he had a crazycool handlebar mustache like muthafuckin hulk hogan!!. he'sprobably part of the next XXXmustacheXXcoreXXX band.