Exageration of the word maximum, usualy used while wanting to create exageration but mostly used by noobs wanting attention.
This is the maxxx you can get.
driving your car 170+ mph and just when you thought that its at its max,you release nitrous oxide.
"the car gave its maxxx"
Said by friends when something extreme occurs.
"After that bottle of Jack he sculled Dwayne was fucked up, 2 the maxxx!!!