A slang term for penis(n.). The word can also have different meanings when used in certain phrases. It can suggest homosexuality or human stupidity. Finally, it can be used as a verb (v.), to directly reference masturbation.
(n.)
1. Leo is a jir - could mean: "Leo is a dick!"

(v.)
2. Leo, go jir - could mean: "Leo, go spank the salami."

(v.)
3. Leo is jiring - could mean: "Leo is jerking off."

(n.)
4. Leo has a plastic jir - means: "Leo lost his dick some time ago due to abuse, and had to have a synthetic dick implemented as a replacement."
by VenIsCool December 19, 2006
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a very nice person that always thinks about others.
OMG he is such a jir.
by I_got_depression_from_girls February 14, 2017
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