1 definition by SI4lyfe

Chill, euphoric, awesome. Better than the usual. Something similar to the feeling of an awesome rave.

Probably drawn from the idea that the metric system is "better" than other systems.
A$AP Rocky: How was that young party last night?

Lil Wayne: Yo dawggg, that shit was metric AF.
by SI4lyfe September 16, 2013
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