max out

max out (third-person singular simple present maxes out, present participle maxing out, simple past and past participle maxed out)

1. (informal, intransitive) To reach the limit of one's capabilities.
2. (informal, intransitive) To reach a maximum or a point at which no more growth or improvement is possible.
   • 2013, Xhenet Aliu, Domesticated Wild Things, and Other Stories, page 69:

     Nadja had not thought of the word elegant since her mother made her model for no real occasion one sequined monstrosity after another at Denise's Bridal Affair, pretending her daughter was a pageanteer and hadn't maxed out at a B-cup.

3. (informal, transitive) To use (something) to the limit of its capabilities

   I've spent all afternoon shopping and maxed out my credit card.