come back swinging?

I got to hear a song 'Stronger' by Kelly Clarkson.
The song was great and I wanted to know what the lyrics are all about.

Here's part of it.

You heard that I was starting over with someone new.
They told you I was moving on; over you.
You didn't think that I'd come back.
I'd come back swinging.
You try to break me, but you see.

What caught my eyes was this : I'd come back swinging.
It was translated into Korean : I'd come back great.

Guessing 'swinging' is somewhat like 'great', I entered 'swinging'
to learn more meaning of it.

Interestingly though, what I got was that 'swing' is
to have open, promiscuity with a select group of partners, who "swing" eachother's wives and girlfriends back and forth to other people.
( http://www.urbandictionary.com/define.php?term=swing )

I was like, what?
So, 'swinging' from 'I'd come back swinging' has something to with sex?

Does the expression, 'I'd come back swinging' usually remind native speakers of sexual stuff?