Top Definition
When a guy is having sex with a girl and he hits the back wall of her vagina.
My girlfriend is so small that every time we have sex, I hit reef.
by Nick77 April 12, 2008
When you're banging a chick and your dick is so long that it hits her cervix.
me: "dude! my new gf is so small i hit reef last night!"

friend: "bullshit, dude. you're asian."
by botokuno July 31, 2008
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.