A jumpoff. Just another way of secretly expressing someone is a slut if the person is nearby so words like jumpoff or hoe is too obvious. It comes from the 10th letter of the alphabet and the 15th alphabet: 10=J and 15=O which translates to J.O. which is short for jumpoff
yo shorty right there is a 10-15
by Big-Liek March 3, 2010
Get the 10-15mug. An act of self pleasuring or masturbation which occurs during an interval of time never exceeding 10 minutes. The key to success is having a paper towel and an empty dorm room.
by Travastar June 27, 2009
Get the Taking 10mug. by 5'1"Racer February 12, 2005
Get the level 10mug. 
by Rick Brock March 7, 2004
Get the 10-4mug. A popular model of the American-born Ingram submachine gun. MAC stands for Military Armament Company. It typically fires 9mm rounds at a blistering 1100 rounds per minute. It is comparable in several facets to most popular SMG ever, the Israeli-born uzi. However, while the Uzi appears in piece of shit games like Tomb Raider, the Ingram appears in groundbreaking gamez like Max Payne 2. (However, several mods have the Ingram changed to a MicroUzi).
by Tha_Evil_Umpyre April 14, 2004
Get the Mac 10mug. A game in which you go around the circle and everyone starts with 10 fingers up. Each person asks a question and if you are guilty you have to put down a finger. You can find out some reveiling stuff about people.
"Lets play 10 fingers"
"Have you ever smoked"
Not me, Not me, um....afraid so.
"Have you ever had sex"
"no way, i am a vigin, well..."
All her fingers are already down? What a whore
"Have you ever smoked"
Not me, Not me, um....afraid so.
"Have you ever had sex"
"no way, i am a vigin, well..."
All her fingers are already down? What a whore
by You wish you were a BAMF like me December 7, 2006
Get the 10 fingersmug.