Sigle "noun" a nickname for the game otherwise known as (Tom Clancy's Rainbow Six Siege) originally brought to life by a pair of idiots known as the ii clan.
The name given to a sorostitute/slam-piece that has ridden on top of so many of the fratstars at the Sigma Phi Epsilonfraternity, that she's basically known as the "saddle" for the house - she'll mount anyone! Just throw her on top and let her enjoy the ride!
The completely oblivious sorostitute saddle will think it's "cool" to be referred to as such, and even tell her friends, big and little sisters that the SigEp "bros" refer to her as that, while not realizing that it's -not- a badge of honor one would want to claim, or should be proud of.
"Rachel is sooooo out of touch with reality that she actually bragged to me that she's known as the "SigEp Saddle" the other day... she has no clue that's not a title one wants to have, or that she should be telling her friends about!
She brags about how she's always at their house, gets invited to their weekends away, their parties... Well girl, it's not cause they like your personality! You're their slam piece! Duh!"
Sgleeven is a way of life, a state of mind, a dance form formally known as The Hustle. The phrase was coined by the Brazilian genius, Daniel Deshcanel, after a young man by the name of Steven was offered a role on Glee. He soon became know as Sgleeven and nothing has been the same ever since. Sgleeven has risen to fame and fortune...nobody knows what he will do next, but rumor has it he will defeat Chuck Norris for the title of Master of the Universe.