Adam, you want to come back strong
here. GO from a position of power.
Something like, "Where am I?
Why don't you check your underpants."
What "go" means in here?
It means something like act. Behave as if you were in a position of power. It's slang. Apparently, the speaker is convinced that saying
Where am I? Why don't you check your underpants.
makes a man seem powerful.