This is a term you use when you're out with your friends and have nothing better to do but to have some nice Bosnian coffe. If you know the waiter, he'll use the same slang too. If you use this, you're the real mvp
- I'm bored.
- Sine kafa?
- Sine, kafa!
by Babin tops December 14, 2017
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a periodic oscillation, as simple harmonic motion, having the same geometric representation as a sine function.
example is too short, so very true.
by irishrepublicanarmy January 2, 2004
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1.Any type of flu that can be caught while you are learning about sine, cosine, and tangent or anything related to that in Math.

2.A time period in which there is an outbreak of a type of flu (for example: bird flu and swine flu) that during that time, you are learning bout sine, cosine,and tangent or anything related to that in Math.
1. John caught the sine flu after passing a Geometry test on the topics of sine, cosine, and tangent.

2.In school, this historical era should be called the sine flu.
by Lazer81095 May 10, 2009
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a sign or any trace that math heads or the math club has been in the room. Usually sighted as long complex problems written on the board and the only thing you know about it is that a "dot" refers to multiplication. Sines of course is refering to the type of line that is to measure a wave.
-walks into home room-

tim: look at the Gang sines
matt: jesus...they are good
tom: 42..the answer is 42 not the square root of pi times 27 cubes....gosh...idiots
by history753 February 24, 2005
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(pre-zeen)
The act of using Visine before smoking weed, as opposed to after. Some employ this method to ensure they don't forget to do so when they are baked or to lessen the discomfort of the Visine, which may be enhanced when baked.
"Yo you got drops? I'm gonna pre-sine it this time, I think it works better."
"Ya, good idea, I don't wanna walk out bakey-eyed."
by Qeqeneq July 22, 2009
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Si(x)=?(sin t)/t dt, a=0, b=x

This function was constructed by using the Second Fundamental Theorem of Calculus (Construction Theorem for Antiderivatives). The function f(t)=(sin t)/t used to give mathematicians a lot of grief since its antiderivative is not an elementary function and that the limit as t approaches 0 of (sin t)/t is 0/0 (we do know that that limit is approximately 1 by using L'Hopital's rule). The Construction Theorem made calculating values of Si(x) to any degree of accuracy easy. This is useful as some scientists and engineers use it all the time in fields such as optics and magnetism.
Si(1)=0.95, Si(2)=1.61, Si(3)=1.85 . . .
by some punk kid February 14, 2005
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A gay ass mother fucker that shove his girlfriends dildo and flashlight up my ass. Is commonly seen driving a riced out Honda Civic with an awful straight pipe. Claims to be a "juggalo" and has an emo haircut
by Zak Sine May 26, 2016
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