Fifteensome

The limit of the "somes". Anything exceeding this is considered an orgy.

- Dude! I had an amazing sixteensome last night!

- *SMACKS* You FOOL! That is considered an ORGY! A fifteensome is the limit, buckaroo.

- Oh shit dude, sorry, I didn't know...

- Do not grieve fellow, we all have much to learn...

by xXThotSlayer69Xx June 1, 2018

Fideen

Barrell chested sky Gods (smokejumpers) jump out of the sky at fideen-hundred feet. Fideen rolls off the tongue better than fifteen. Fideen is less likely to be confused with fifty and is widely used in the barell chested sky God (i.e smokejumpers) community.

It's always fideen.

by Bokchoypanini September 12, 2019

Fifteen to One Scale

The theory that for every 15 pounds a man puts on, that he loses 1 inch in penis length, due to the increase in the fat pad on the pubic bone.

Fat? That dude's running a minus on the Fifteen to One scale!

by Squik da Kitty February 20, 2010

fifteenth base

The act of raping a squirrel.

Dude, my Asian buddy was able to get to fifteenth base yesterday! I tried and couldn't fit.

by thefixer551 November 17, 2009

fifteen second rule

the rule whereby if a college student is present in his dormitory and takes more than fifteen seconds to answer after a knock, one can assume that he is masturbating.

Bill: Matt, are you there? (knocking)

Matt: Yep, hold on.

(waiting)

(waiting)

(waiting)

Bill: Fifteen second rule, you're officially masturbating. (turns around)
Hey everyone! Matt's masturbating!

by The Iron Fist January 5, 2009

Fiteen

The line you say before finishing with fiteen my balls in your mouf

Me: Hey Jack this girl named 'Fiteen' follows me on insta
Jack: 'Fiteen who'
Me: 'Fiteen' my balls in your mouf

by Your throats a daycare June 9, 2020

final fifteen

weight gained in the last year of graduate school as a result of sitting on your ass and writing your thesis/dissertation day after day.

Person A: Has David gained weight? He's looking a little doughy lately.

Person B: Yeah, but it's just the final fifteen. He'll start hitting the gym again after the thesis is finished.

by UCDSocGrad November 19, 2011