FOSS is an acroymn which refers to Free and Open Source Software. A term nessicary to describe two releated entities, yet different and seperate in some important philosophies.

This acroymn has its origins when the Free Software Foundation proclaimed their GNU General Public License as not actually open source, even though it is considered an open source liscense and is compliant with the Open Source Definition as described by the Open Source Initiative.
The FOSS communities are related, and differ only in extreamly judgemental geek lexicon and proclamations.
by Indrid Cold August 08, 2004
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Fresh Off the Slave Ship

A term typically used to apply to people when they are dressed too gaudily for a given occasion. It is believed that when Africans were brought to America as slaves, they thought they were going on a cruise and wore their best clothes. When they landed, they found out that it was all for nought.
Look at that Persian all dressed up at the DMV. He is such a FOSS!

You're wearing Gucci, Armani, Dolce & Gabbana, and Christian Dior all at the same time? You are an incredible FOSS!
by Dip-meister July 23, 2009
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"Hey i think your mate has a case of FOSS"

You can just nickname someone who talks alot of shit "FOSS"
by h0m1ez July 22, 2008
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The new word for "cool". It used to be "sick, tight, awesome, rad, ill, chill, and sweet". Now it's fosse.

~as made popular by Candyland~
1. That guys tricked out Escalade is pretty fosse.

2. That old Toyota Camry with the broken window is NOT fosse.
by CandylandDjs October 19, 2012
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n. (faussee) 1.a famous dance corriographer known for his uber-gay moves.

adj. (faussee) 2. extravogant, unnecessary, overboard.
3. gay.
Drew is watching his lover stephan prance around the apartment and says,"ooh stephan! you are SO Fosse right now."
by winksie April 13, 2008
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-stopping the smoke from escaping a bowl/pipe or bong by holding your hand over the opening
-cover the hole

To foss, fossing
bruh, foss it

Yo foss it foss it!!!!
Make sure you foss it
by st0n3rchiK August 17, 2018
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