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West-Irish slang for 'Guinness Shite'- the black/green greasy monstrosity that exits the body after a night out drinkin' Guinness. Usually accompanied by an unholy smell that fills the entire room, leaving all others in the vicinity shouting or roaring, generally expressing extreme disgust and anger.
An accompaniment to the Slypack is a Packsly; this is a Guinness fart, which is oftentimes just as greasy as the Slypack itself and a whole lot more Pungent, akin to a a dead skunk crossed with... stale Guinness.

The Slypack is generally enjoyable to the creator, and for obvious reasons not so enjoyable to those who encounter it; therefore some view the Slypack as a practical joke under certain circumstances, i.e. when there's only one toilet in the house and, deviously, a Slypack blocks the pipe, not only disallowing other Slypacks to be made but also filling the house with it's own horrid odor.
"Christ almighty fellas, I'm after making the most unholy Slypack inside in the toilet,"

"Ah for fuck's sake, he's after making a Slypack again. That's the fifth time this morning,"

"I was up all night with a mad bout of the Packsly fellas- i thought it was the baked beans but then i remembered the feckin' Guinness,"
Slypack by Ryan Lavin April 27, 2008

Freudian slypo

A Freudian slip...but a typo. When you type something you did not mean to type...but your subconscious really wanted to say.
an example of a Freudian slypo would be "I look like a god" when you meant to say, humbly, "I look like a dog" but your subconscious is an EGO-MANIAC!!!!!
Freudian slypo by leenirama January 2, 2010
Slype - to slype - slyping.
To slype something that isn't yours. To take but want to give something in return. To slype, or slyping as it is more commonly called is know for it's use with the extremely popular "no slyping meme."
Slype by Jamantha Pickens January 8, 2019
someone who is a VERY slow typer or slow at responding to a message online or through text.
my friend is a slyper. it's takes her like, 10 minutes to respond to my text!
slyper by Lindsaapop September 3, 2010

Slype Syndrome 

Playing a game, you absolutely hate, over and over again. Asking yourself why you keep doing it.
That guy has the Slype Syndrome, he keeps playing that game over and over again despite hating it.
Slype Syndrome by defraudem October 1, 2018
to be slutty while getting hyphy
damn that girl just got hella SLYPHY
slyphy by domsss March 18, 2007