I do what I do
expression explaining that is how they do things and shouldn't be questioned any further
example 1:
person 1- hey why are you always getting into fights when we go out
person 2- hey i do what i do
person 1- ah of course
example 2:
person 1- were you really hitting on that chick last night
person 2- i do what i do
person 1- gotcha
person 1- hey why are you always getting into fights when we go out
person 2- hey i do what i do
person 1- ah of course
example 2:
person 1- were you really hitting on that chick last night
person 2- i do what i do
person 1- gotcha