Who said that first? And what was X? (I’m thinking ‘gun’)
Probably not the first, but to get the ball rolling:
Certainly not the first, but earlier than Bazooka:
Flesh Gordon (1974) “I’ve got the Power Pasties, and I know how to use them!”
Another variation, although not the original you’re looking for:
We’ve Got a Fuzzbox and We’re Gonna Use It - 1985
The beginning of Time and Space.
“I have a Universe, and I’m not afraid to use it!”
Here’s a linguistics mailing list reply that traces the phrase (in slightly modified form) as far back as a 1903 newspaper account - and from the way it’s used in these accounts, I’d suspect it was in common usage before that:
It was Gimli, surely? He actually had several of them, but he wasn’t the sort to brag.
Reading the title, I couldn’t help but think about my 8-year-old (at the time) nephew quoting a line from “Kung Pow Enter the Fist:”
“If you’ve got an ass, I’ll kick it.”
[/end of hijack]
Ooh, that’s a good one.
I suspect, from the above, that there probably isn’t a defining original film / work of literature that contains the phrase, it just sort of seeped into popular consciousness through people using it in real life.
Which I guess isn’t so surprising when you think about it.
I know it’s not the first, but the best one I’ve ever heard was from one of my coworkers at the restaurant I worked at. We were picking on her a bit and she came up with “I’ve got a bad singing voice and I’m not afraid to use it!” then proceeded to sing Celine Dion.