I'm hanging out with my good friend.

I'm hanging out with my son, Post Malone.

Post. -What's up, Dad?

-Since you are about to launch your brand-new

Celebrity World Pong League, I wanted to challenge you

to the Every Drinking Game Ever Challenge.

♪ -Every drinking game challenge ♪

-Okay.

Post, this first one is a classic.

The first game we're about to play is Flip Cup.

-Flip Cup. First one to drink and flip all their cups wins.

-Are you nervous at all?

-Not at all.

-Ready?

-Yes, sir.

-Set. Go!

♪♪

-Oh, my God.

♪♪

♪♪

[ Dinging ] -Oh! What's up, dude?!

Yo! What is up, dude?!

What is up, man?! Blah!

[ Laughs ]

-Quarters.

Bounce the quarter off the table into the glass.

-I'm going to be straight with you.

I've never played this game.

It seems a bit primordial.

-Alright, ready? Here we go.

On your mark. Get set. Go.

♪♪

-Oh, no.

-God. That one went backward.

Oh, my gosh!

Yo!

[ Dinging ] Oh, my gosh!

Dude, what is happening?

Grandpa's got to get back out on the scene!

You missed the --

This is like old timer's day at the ballpark.

I come limping out.

Can we have a replay of that, Dave,

just so Post can see the magic of this?

Watch this. Watch this gem.

Boing! -Oh, my God.

-Doing! [ Laughs ]

Ah!

Enjoy that cold beverage, my friend.

Cheers. -Cheers, Jim.

-Cheers, bud.

-Never Have I Ever.

Put a finger down if you've done the deed.

First person with all fingers down loses.

-Three fingers up. I will start.

Never have I ever, uh, lost $1,000 on a bet.

-Specifically $1,000? -In that ballpark.

-Or over? -Over?

-Yeah, I've made some dumb bets in my life.

So are you saying over $1,000?

-Yeah, I'm going to say $10,000.

-Okay, let's do $10,000, too. Okay.

-You got to put a finger down, oh, my gosh.

Okay. Alright, now you ask.

-Never have I ever...

taken the postal exam as a career fallback.

-[ Laughs ]

You sadly know too much about me.

My parents really believed in my comedy career and I was a --

I would have been a great mailman.

And I got job offers.

And they would have loved me.

But, yes, I have done that.

And gosh, I love the post office and I love postal workers.

Okay, my man, have you ever --

never have I ever gone out

for drinking one night and then woke up in a different city.

Actually, you know what?

That's bad for me because I have done that.

-Yeah, I'll drink too. Cheers, sir.

[ Laughter ]

-Two times.

You got one for me?

-Never have I ever been mistaken for another celebrity.

-Oh, my gosh. That happens to me all the time.

Tom Cruise. Every time I go out.

-Tom Cruise?

-Yeah, absolutely, yeah.

Tom Cruise, yeah, all the time.

-I'll put mine down too 'cause I get Brad Pitt all the time.

-Beer Pong.

Throw a Ping-Pong ball in your opponent's cups.

First to sink each cup wins.

-Post, since you're the resident beer pong expert,

I'm going to go first. Here we go.

Hey, do you soak your ball?

Do you get it wet before you throw?

-Yes, sir.

You know, it's impoi-- it's "impoitant" to make it --

[ Laughs ]

It's impoitant to make it --

-Of "coirse." Of coirse it's impoitant.

Here we go, bud.

♪♪

Oh, gosh. -That's alright. That's alright.

-Come on, bud. Let's see what you got.

♪♪

-Ooh! -Aah!

Gosh darn. Which one? Top one you did?

I know this is going to be bad.

♪♪

Gosh. Ugh!

Alright, come on, come on.

Let's make it close.

Uh! God.

That was just ugly, ugly! That was just ugly!

♪♪

-Oh! -Oh, my God.

-He's a master. Dude, he's a ninja. He's a master.

-I got to be honest. On the pong show, I didn't do so well.

It was not my week.

-Two down. Alright. Here we go. Gosh.

♪♪

[ Laughter ]

I think I just hit you in the -- hit you in the nad.

-Oh! -Oh, my gosh!

[ Dinging ]

He's the master. He is the master!

He remains the champion!

Post Malone, everybody!

His new show, "Post Malone's Celebrity World Pong League,"

is out November 18th on Messenger's Watch Together.

You're the champ, Posty. Always good to see you, pal.

Stick around. We got more "Tonight Show."

♪♪