Refers literally to a man, but specifically to someone whose skills or physical stature make him especially intimidating. A badass
. Can be used metaphorically to refer to a woman, as long as she is a total badass at something.
There is a common misconception that this term refers to any male because it references the male organ, but the more important part of the term is "swingin'." That is, not just any man, but an especially potent or imposing man. Hence, a badass.
1) As in No Country for Old Men: "Call my room if anybody comes in--and by 'anybody' I mean any swingin' dick."
2) A: "Did you read that new Judith Butler article? She totally destabilizes the regime's reinscription of normative typologies."
B: "Yeah, she's a swingin' dick when it comes to critique. Also, stop talking like a d-bag."
US Navy and Marine Corps reference to a dude, a man, a male of the human species. Often used plurally.
"I didn't get no ass on liberty. It was a sausage fest
, nothin' but swingin' dicks!"
A big time mover and shaker, one who feels their self-importance to society is so high that they use extra starch on their shirts as if they were on their way to a Dracula convention.
Look at that guy, he's a real swingin' dick. His shirt is so stiff it could walk by itself.