(interjection) a variation of lolsan; derived from lolsan and the trigonometric function sine, representing the value equal to quotient of the opposite side of a right triangle of angle (ß) and the hypotenuse of the same right triangle
(See Cocksmack) The welt left by the head of a circumsized cock after a bitch gets out of line when giving you head and needs to get smacked upside her head.
Oh man, it's turns out that bitch was a biter and I had to leave her with a viciousmushroom welt!