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noun: An injury involving cutting, lacerating, or mangling one's hand, finger, or fingers on the strings or hardware of an electric guitar in the course of picking or strumming an electric guitar with extreme fervor and reckless abandon.

NOTE: The word is derived from the manner in which Pete Townshend – of The Who fame – frequently injured his right, strumming and picking hand during his performances, as he did his famous "windmills" and otherwise played with extreme passion and violence to the point of self-mutilation. Townshend once impaled the palm of his right hand with the vibrato arm of his Fender Stratocaster, which resulted in the cancellation of several shows of a concert tour.
Ex.: Robert did a Peteism, gashing his hand on the metal parts of his guitar as he played, while the strings and the guitar body were streaked with blood.
Peteism by Achilles Murat II October 27, 2011
1) playing video games and immensely enjoying it.

2) Going to bed at a really early time. The earlier the more peteish.
1) He couldn't hang out with us today, because he would rather stay home and be peteish.

2) I stayed up all night last night, so tonight i'll probably end up being peteish.
peteish by Sidenote October 9, 2006
Related Words
The philosophy of not being dumb and actually looking into stuff more than just what someone else says and developing your own opinions while they aren't being affected by someone else and being yourself, while also not shaming people that don't believe what you don't believe, because that causes pooism.
"Man I have no clue why more people don't use Peeism more, it's just right"
"Yeah, people are just dumb"
Peeism by PeeZus420 November 1, 2021

Peterism 

A set of phrases repeated in various sitations, including but not limited to; having valuable (aka high yield) information for a medical school examination, getting your dick sucked, or performing a series of tasks in a very quick manner.
TA: "Remember that this is activated when it's phosophorylated, that's a test question"
Peter: "Daammnnn, he's on that high yield! He's about to get his dick sucked reeeaaal quick!"
Other student: "Damn! That was like 4 peterism's in one sentence!"
Peterism by AUCMay2011 October 21, 2011

Petersmack 

To strike forcefully with the male member, the person or object may show superficial mushroom shaped markings from the attack.
If Jill takes the last doughnut, I'll petersmack it right out of her mouth !
Petersmack by BigdogB December 21, 2013
a philosophy based on humans as pets of God
Petism compares the hierarchy of humans and our pets to God and humans.
Petism by Liwi September 1, 2013
believing that all animals are superior and more valuable than any human; political hater of the human race
Hillary, a staunch believer in PETAism, tested a food sample on her four children before feeding it to her pet fish to make sure it was safe for him to consume.
PETAism by rsnisgay1 November 20, 2009