An exclaimation, generally used to describe either something surprising or something extremely cool, radical, awesome, or any other adjective from the Ninja Turtle vocabulary.
You have your hair cut, coloured and styled in a top salon by a man wearing more make-up than you. He tells you the cost of your new barnet - you gasp, then mutter "'sweet italian fucking jesus!' I won't be coming back here again"
The hypothetical man (often a sinistercharacter who decided not to go to boot camp) that is doing your girlfriend/wife while you are on deployment overseas.
Ain't no use in goin home,
Jody's got your girl and gone.
Ain't no use in goin back,
Jody's got your Cadillac,
Ain't no use in feeling blue,
Jody's took your checkbook too.