look up any word, like darude - sandstorm:
 
1.
To know more than there is to know...
I ain't gonna study, I'm feelin' all jerby.
by ken March 17, 2005
 
2.
commonly known as 'shit'. also known as dung, molasses or crap.

can also be used to define the act of shitting.
Two hours after eating veggies, I felt like I wanna jerby.

OMG! There's a floating jerby on the toilet!
by newjejebuster May 02, 2010