What is Do The Job?
1.
Somone fit who will get the job done.
Can also be used in other ways i.e "Oh i suppose that Microwave will do the job at the end of the day".
"Ah, she'll do the job".
See
2.
verb: to thoroughly beat the crap out of an individual, usually done to make sure an individual acts as desired.
Guy 1: Yea, I can't go tonight. I've got something else going on.
Guy 2: Oh don't make me do the job on you.
Guy 1: Alright fine, I'll go.
See