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11.
Used with regard to partaking in sexual activity. Also often used as a vocative command suggesting/ordering another person to partake in sexual activity, particularly sexual intercourse.

Past tense: dood it
Man, I want to do it with the Olsen Twins. (Standard)

Shit man, you've been dating that chick for nine years, fucking do it already! (Vocative)

Instead of going to class this morning my girlfriend and I woke up and dood it instead. (Past Tense)
by King of Awesome June 02, 2005
 
1.
To have sexual intercourse.

Anyone over the age of 11 who refers to sex as "doing it" should be throttled.
"So did you do it?"

"You mean have sex? Yes"
by Jake February 09, 2005
 
2.
something that ben stiller says that is very funny in starsky and hutch
do it! do it! pop the trunk! do it!
by MACLELLAN ROCKED THE MIC March 14, 2004
 
3.
have sex (literally)
We're gonna do it!
by Jerri Matherson March 14, 2004
 
4.
1. A verb in command form with a direct object. "It" can define almost anything.
2. A term used to promote the use of an activity, often coupled with peer pressure.
3. Colloquial for sexual intercourse. Often used before one has the maturity to pronounce the word 'sex'.
1. Do it! Clean the dishes!
2. "I'm not smoking this joint..."
"DO IT! Smoke the joint! Once isn't gonna hurt!"
3. Ah, c'mon, me and Jessica do it all the time without condoms.
by Anonymous Etc. February 03, 2006
 
5.
1) Originated from the 2004 comedy Starsky and Hutch.
2) It is simply a phrase commanding someone to do something. (Must be said in a deep voice)
Suck on it! DO IT!
by Aren and Allen April 12, 2004
 
6.
to have sex; phrase should not be used by anyone past the age of 20.
"So if i talk to you for a while, then can we do it?"
by Necie June 27, 2004
 
7.
One of the shortest yet most powerful phrases in the English language, the use of "DO IT!" has been inadvertently sending young men to jail and/or the hospital since sometime in the early 1920's. If anything bad happens in your life, it's probably because one of your friends yelled this at you.
Prosecuting Attorney: And at what point did you decide that it would be a good idea to "T-bag" Officer Jones?

Defendant: When my buddies yelled "DO IT!" (Courtroom erupts in applause)
by GreenParrot713 September 17, 2009