She's got a top gun, busy on a tough s*it..
She's got a hot gun, busy that will blow you apart..

The story:

When I was little and learning the English language after
moving from South America I heard this song one day and
liked the tune, but couldn't figure out why there was a swear
in the song and they were allowed to say it. I honestly
believed until years later that "tough s**t" was the actual lyrics
and that Phil Collins could somehow get away with blunt
vulgarity in his music on the radio!