Another way of saying "no kidding", "no shit sherlock".

Pointing out that something said by another was painfully obvious

Originated in the mid 1970's and used primarily by females known as "valley girls"

often followed by the word "now"
jodi: hey, did ya know that elephants are big and grey?
jill: doy!

Jodi: ice cream is cold
Jill: doy now!
by Tenarr June 26, 2005
Get a doy mug for your Facebook friend Paul.
Doying. Sounds like boing. Someone who is acting stupid, but might not be and could just be really high at the time.
You are such a doying when you act like that.

Don't be a doying, I know that you had pants on a minute ago.

{dingbat} {stupid} {stoned} {wingnut}
by Fritzheimer February 15, 2016
Get a doying mug for your cat Bob.
An 80's term, relative to the phrase "no sh*t" also refering to a dunce or someone who is very stupid. the word "no" is usually added as no doi!
Johnny's station wagon is cool.
No Doi you tard.
or

Is Johnny's wagon retro? Doi of course it is, you frigg'n idiot!
by rtreverend May 31, 2009
Get the Doi neck gaiter and mug.
Tom:Hey, wanna see somethin' cool?
Josh:*sigh* Whatever...
Tom:*walks up wall* Doi!
Josh:Why do I hang out with you?
by CompletelyRetarded June 27, 2010
Get a Doi mug for your buddy Riley.
The bounce emitted from an erect penis, usually when being released from either tight underwear or any orifice (during sex).
When she pulled his clothes off, his hard on doiinged out like a diving board.
by Sticky Sheets July 29, 2014
Get a doiing mug for your papa Paul.
Stands for good golly are you slow. Also it too can mean the same as duh....DOY is just way cooler to say...fo sho
Did you go to school today?
Doy Carl, you only saw me.
by jessica March 30, 2004
Get a doy mug for your mom Beatrix.
Person 1: Wow, u and Fred are going to prom?
Person 2: Yup.
Person 1: So u two are like, together?
Person 2: Doy!
by iLoVeThE80s7498 August 06, 2010
Get a doy mug for your fish Bob.