A Pokemon card/creature resembling a snake made out of rocks.  The phallic nature of this creature was noted in a sly reference in the manga Aoi House.
by the birds and trees May 14, 2007
 Get the onixmug.
Get the onixmug. button tapping mouse clicking player frequently found wearing a wetsuit and snorkel while practicing 3 hours of pub a day
by evilmidnightbomber March 30, 2004
 Get the onixmug.
Get the onixmug. When you use a stone as a dildo for her ass, while you're fucking her pussy and screaming "you dont have enough badges to train me."
Hey lil bro have you ever tried onixing,
no big brother what is that
you'll learn in time, young padawan, you'll learn in time
no big brother what is that
you'll learn in time, young padawan, you'll learn in time
by Arcaeus August 20, 2015
 Get the onixingmug.
Get the onixingmug. Fuck onix
by Thecoonman2407 July 28, 2021
 Get the Onixmug.
Get the Onixmug. In Pokemon, an Onix is a long, thin character made of a bunch of different rocks. Therefore, when you take a crap, and it is whole, but looks like its been broken up into a bunch of little balls all clumped together, you have officially Shit an Onix.
Damn, Omar, I've been holding in this crap all day. I feel like I'm about to shit an onix like a foot long.
by Creebie February 23, 2009
 Get the Shit an Onixmug.
Get the Shit an Onixmug. 