max out
phrasal verb with max verb uk/mæks/ us/mæks/
mainly US informal做得尽可能多(或过多);拥有尽可能多(或过多)
to do or have as much as possible of something, or too much of something
The air conditioner was maxed out, but it still felt hot in the car. 车内空调已经开得最大了,但还是觉得热。