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

to let one's hair down 

In general: to leave behind one's inhibitions or to behave in a way that is free from social limitations or any code of conduct.

(to let one's hair down)
Corrine Bailey Rae, Song:
Put your records on
Girl, put your records on, tell me your favourite song
You go ahead, let your hair down
Sapphire and faded jeans, I hope you get your dreams,
Just go ahead, let your hair down.

to let one's hair down by Pentametrics August 23, 2008

let one's hair down

(verb) to relax; to behave informally.

Letcho hair down, dog!

let one's hair down by Fangsta March 18, 2003

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

Go down on one knee 

Performing oral sex on a one legged woman

"Do you think Paul will ever go down on one knee again?"

Go down on one knee by andD November 3, 2006

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

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