sex 

When two people decide that they're horny and want to have sex. Sex can be 4 things:
1. When a man puts his penis into a girl's vagina.
2. When a man puts his penis into a man's butthole.
3. When two girls take a dildo and imitate 1.
4. Not technically sex but when a girl/man sucks on a man's penis.

One day as I was hanging out in my room, my boyfriend came in. "Hey babe." He said. "Hi." He walked over to my bed and sat down. "Listen, I'm hor-" I cut him off with a kiss. "Me too," I whispered. In a flash all of our clothes were of and in a pile on the floor. He and I had sex harder then ever before and afterwords I sucked him off.

sex by Caveflower November 2, 2014

sex 

A related word to almost every other word defined on Urban Dictionary.

Man: Sex?

Woman: No.

sex by Dude in Your Pants December 7, 2009

sex 

That mysterious thing no one talks about in India but which apparently goes on with great enthusiasm behind closed doors.

While I look up sex in a Hindi dictionary 10000 babies have been born.

sex by krzn March 9, 2010

sex 

something you do when your horny as fuck.

he grabbed me by the neck and pushed me onto the bed. he rubbed his finger in my pussy. i screamed. he sucked my huge boobs and then sucked them so hard that i have a hickey on both tits now and i dont even care. i screamed more and he then rubbed his dick ALL OVER MY WET PUSSY. he said to me in a whisper in my ear: let me play with you. then he massaged my pussy which was wet as FUCK. i screamed more. he grabbed my neck and whispered again. im gonna fuck you all night, baby. lemme take control of your body for you. he stuck his cock into my mouth and i sucked it so hard. i was so horny. im literally rubbing my pussy so good rn. i moaned so loudly. my dumb sister walked into the room with her boyfriend. her boyfriend pushed her away and jumped onto me. i had two dicks all over me. my sisters boyfriend said to me: im gonna suck ur pussy the whole night. i eventually felt so good that i fell asleep and the two pussy-suckers were all over my body. ones dick was in my mouth while the other was massgeing my pussy which was wet like the ocean. it was the best night ever and now im rubbing my pussy hard and im FUCKING HORNY SO GET UR DICK OVER HERE AND COME FUCK ME BECAUSE I WANNA HAVE SO MUCH MOTHERFUCKING SEX WITH YOU AND I NEED U.

sex by lemon poppy seed June 17, 2020

Sex 

When a man's penis enters a woman's vigina.

"Ew, can you hear that!?"
"Hear what?..."
"I think I can hear my parents having sex."
"Sweet, your mom is hot."

Sex by Andy Mac November 16, 2006

sex 

when a male sticks his penis inside a vagina.

yeah dude, I had sex with her

sex by b&j April 6, 2015

sex 

You need it!

One day, waiting outside my girlfriends house, with both of us, we started passionately kissing, and kissing made into making out. From there on forward, we jumped in a bush and got to it, the sex. We stripped each other slowly and carefully. Throughout our experience, I did whatever she said. I was told only to do 2 things. 1. To shove it in her pussy and 2. to masturbate her as I did. That was exactly what I did, but all moaning and groaning was what I heard. The only thing she does, was rub my balls until I was hard, and I thrusted more harder than before. That made her immediately horny and kinky, so she handcuffed me to some sticks, and sucked me off. The best night of my life.

sex by MattyTurkey June 7, 2011