Bums, we got bums, we got bums-a-bums
Ah, we got bum, bums, we got bums-a-bums
Ah, we got bum, bum, we got bums-ba-bums
We got a big, bad bag full of dynamite

Alright, three-two-one
The condom's on,
And we say three-two-one
We'v

The story:

I've had this song on my computer for a few years but I never
bothered to find out what the lyrics were.
I was making dinner and singing along to music (after having
had a certain amount of wine). The song came on and I was
singing away, until a friend pointed out that what I was singing
was unlikely to be the real lyrics.