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S.I.S.S.

Sudden Ice Shift Syndrome. An event that sometimes occurs when a person is drinking a beverage containing ice. As a container is tipped up to pour the liquid into the mouth, a mass of ice, formerly lodged near the bottom of the container, shifts under the force of gravity, causing the beverage to spill down the chin of the drinker. This phenominon is not observed when drinking through a straw.
As he mopped the stain on the front of his shirt, the young man who had just tried to pour the last of his long island iced tea into his mouth exclaimed "SISS!" (pronouncing the acronym S.I.S.S.)
by Dale Seng November 23, 2006
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S.i.S.

Person A: (When z1,) X > Y.
Person B: But when z2, Y > X!
Person C: *facepalm*C'mon guys, S.i.S.
by ShamayaXI September 12, 2009
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P.S.I.S.

i'll be with you in a bit, imma hit the shower- P.S.I.S

P.S.I.S. after that workout
by michael foolsley December 15, 2010
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Si Slag

Si Slag is an older verizon of the Slag, this is the woman with the 15 yrs of smoking in her voice, or the 35 yr old trying to flirt with the 23 year old guys.
Yo, that bitch at the bar with the leather skin from all those tanning beds is definately a Si Slag.
by Chuck Tooth February 20, 2005
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M.I.S.I.C.H.N.O.

M.I.S.I.C.H.N.O. - "Money Is Something I Currently Have None Of"
An acronym for all of our broke asses to use on the daily. Deriving from Wu-Tang and Method Mans infamous term C.R.E.A.M. (Cash Rules Everything Around Me), it is relatively opposite. While C.R.E.A.M. relates to the domination of money in our society and the wealthiness of others and maybe oneself, M.I.S.I.C.H.N.O. is a term describing how badly oneself is deprived of the much needed currency they need to survive, making life more difficult than it already is.
Jesus Christ - "Yo, Do you have any money I can borrow? I need to pay my life insurance payment by tomorrow."

Colonel Sanders - "Nah, M.I.S.I.C.H.N.O. brotha! My bad."

Jesus Christ - "God damn it!"
by ActionJacksen88 June 14, 2010
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S.I.S.A.

Studying Induced Social Awkwardness - when the time spent studying in a group (or alone) leads to social awkward behavior. These include but are not limited to laughing inappropriately, juvenile humor, and interactions that are abnormal at best.
He asked me how to get to the library. I forgot where it was. I had just left the library. Such S.I.S.A

She just changed her profile picture to be the cover of a book authored by a guys named Funk and Seamon... epic S.I.S.A.

Girl: "Hey, wanna come over later to, ummm, study"
Guy" "Do you mean sex?"
Girl: "Oh, God no, sorry, I momentarily forgot the word "study" - I didn't mean to suggest, no, i mean, not that I wouldn't be into it. Oh, God. Um, so, does 11 work?"
Guy: "S.I.S.A... i get it. I'll bring my Funk & Seamon study guide."
by eg$ May 21, 2011
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S.I.S.S.

Police, Sheriff or any law enforcement officer

A couple S.I.S.S. chased me over a couple fences.
by JAE26 March 28, 2007
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