noun
[singular] chiefly US informal :the largest amount possible :maximum
to the max
informal :as much as possible
adverb
informal :at the most :maximum
verb
maxes; maxed; maxing
max out
[phrasal verb] informal
to reach an upper limit :to come to the highest level possible
max (something) out or max out (something)
to spend all of the money that your credit card allows you to borrow :to use up all available credit on (a credit card)
to use or fill (something) as much as possible :to push (something) to a limit or an extreme