“I’ve Got to See a Man About a Horse”

It just means he has "business" to attend to

If only there were a machine that could tell you

It means he's got a hookup waiting in the stalls to suck him off.

Would it have killed you to have at least posted a picture or link? I mean would that have been so hard? Would it? Why don’t you try to think more of others next time before you post?

I just say, "I'm going to bang my peter against the porceline."

How pretentious. Just say I need to go wee wee.

That Wikipedia entry surprised me. I thought the phrase was related to the trope "pee like a "racehorse".

Whos' the new Search Scold?. Kind of clever but gets annoying

I'm dropping off the kids at the pool.

"I've got to cash a check."

"See a man about a dog."

Or my favorite anecdote: Ernest Bevin (trade unionist, Labour politician) standing at the urinal next to Frank Giles once quipped, "“This is it, Giles, the socialist dream – the means of production in the hands of the people.”

Holy Crap, I thought I knew what this meant. Since I heard it in old westerns, I thought it was an excuse a character used to leave a scene (as opposed to get a drink, which makes perfect sense). I thought people use it today as a jokey excuse.

One of my favorite lines- Karen Walker says - "I have to see a man about a horse pill"

I'm taking the Browns to the Super Bowl.

Be right back brah....I gotta tinkle.

R8, I am not the search scold you seek.

There's a brown dog scratching at the back door.

Need to pinch a loaf.

It has only meant one thing when I've said it. I'm going to my dealer's. That was before they delivered to me. But it pretty much means you're telling somebody you're leaving to take care of something or other that is a little on the shady side.

Gotta drain the dragon!

Two Australian euphemisms I've heard: "Time to go splash the boots" and "Gotta go shake hands with the wife's best friend."

Those aren’t euphemisms. They’re more graphic than what they replace. They’re the opposite of euphemisms.

Australians aren’t known for their subtlety.

I gotta go drain the vein.