max (v.)

"to reach the maximum level," by 1986, colloquial, from maximize or related words. Related: Maxed; maxing. As a noun, by 1811 in reference to a kind of gin said to be the best, apparently an abbreviation of French maxime.

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Definitions of max from WordNet

max (n.)
street names for gamma hydroxybutyrate;
Synonyms: soap / scoop / liquid ecstasy / grievous bodily harm / goop / Georgia home boy / easy lay