Down in one 

Chugging a beer in one shot

At the bar Steve raised his glass, made a toast, and did a down in one.
chugging drinking

Down in one by Scpeck May 25, 2013

down in one 

a phrase, chanted repeatedly, when you want someone to finish their drink in one gulp.

man 1: dude, we gotta hurry or we'll miss the game!
man 2: just let me finish my drink, okay?
man 1: down in one! down in one!

down in one by parlejeudi July 11, 2009

Down in One!

The beginning of counting down for someone to chug their beer, or drink they must drink. And if the whole thing is sung and they haven't finished their drink then they don't deserve to be at your party.
(The full P.C. phrase: Down in One! , Down in One, Down in One, Down in Two, Down in Two, Down in Two, Down in Three, Down in Three, Down in Three, Down in Four ... You're a Bore, Why are we waiting we could be masterb*ting, Drink MF, Drink MF Drink!)

Drunk Party People: *Playing Kings Cup*
Very Drunk Bro: *Gets stacked* Damn it, I lost.
Everyone else: Down in One!...
Very Drunk Bro: *Finishes by Two*
Me: Well that's what you get for standing to the left of me.

Down in One! by Investigate311#BirdUp April 18, 2019

One in the mouth and one down south

When two males and a female participate in the act of copulation and one male's genitalia are in the mouth of the female and the other's genitalia are in either her buttocks or her vagina.

My friend and I wanted to have a threesome with a female from the workplace except we weren't comfortable with textbook double penetration so we decided to put one in the mouth and one down south.

One in the mouth and one down south by Jakovovich February 9, 2010

Back in 1991 I saw a guy driving down the road who owned one. 

Greg Snyder was witness to one of the most key moments of 1991. It was back in 1991 when he saw a guy driving down the road who owned one. Greg went on to state his claim for all to see on social media. He didn’t care who believed him. A man of principle and character, a gentleman and a scholar.

Whoa, look at that sweet 1988 Chrysler Conquest TSI!!
Back in 1991 I saw a guy driving down the road who owned one.

Back in 1991 I saw a guy driving down the road who owned one. by Hurt Feelings December 2, 2020