Marginal 

Word describing a friend that is a taker and not a giver - someone that never shows up or pays for a tab or helps in any way. Not a true friend.

Thanks for showing at my birthday party marginal...I really appreciate it.

Russ is so marginal - jackass got drunk and missed dinner tonight - what the hell?

Marginal by B. Hanback January 14, 2010

marginal tax rate 

The tax rate at which the last dollar of income is taxed.

High marginal tax rates are a disincentive towards work and productivity.

marginal tax rate by Alan Greenspan May 7, 2003

marginalized 

When the put butter on you.

When Tom wanted to go tanning his friends reccomended he not get marginalized.

marginalized by mr. D1c3 May 30, 2015

marginable 

a word used by the uneducated to mean 'marginal'

Cleaning scratched eyeglasses will only result in a marginable improvement.

marginable by Blitz$M.Inc.$ June 13, 2010

Law of Diminishing Marginal Fucks Given

The rate at which one gives gives fewer fucks.

DMFG: G(F)={(D/S)*D{Nbar^2} -- the number of given fucks is equal to the days left in the semester times the distance from you to the nearest bar (Cornell notation replaces Nbar with NBrB)

There's an economic principle at play here. One that I think a lot of people take away from econ courses. It's called the Law of Diminishing Marginal Fucks Given (or DMFG).

Law of Diminishing Marginal Fucks Given by Andj87 May 19, 2016

Marginalia 

1) A vagina at the margins; 2) an organ that is nearly a vagina.

At first, I couldn't believe that Frank had sex with Larry. But, then I remembered that Larry was a post-op tranny, and so therefore had a marginalia.

Marginalia by Sam the Word Keeper April 14, 2009

Marginalia 

Doodles/drawings done in the margin of a notebook.

John: Hey, I saw the marginalia you did in English yesterday. It was pretty good.

Luke: Thanks!

Marginalia by smileymagicbeth March 19, 2010