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1.
To shit one's pants, grab a handful of feces from the dirtied pants and throw it at someone.
She tried to introduce me to her new boyfriend so I mudjacked the bitch and bailed through the kitchen.
by Pepe Lopez April 14, 2005
 
2.
v. The act of deficating in ones hand (or using feces from acquired from anywhere) and using the feces as lubrication to masturbate.
I mud jacked in the shower last night.
by smangz March 07, 2011