In a generic age-irrelevant view of the concept: someone who wouldn't or can't get himself to do what they know is the right thing to do.
Someone who likes someone else but wouldn't act upon it; simply cause they are too immature to do what normal people would do.
by s-bandt November 6, 2011
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A young person, usualy a 8-14 year old male that knows 100+ words that mean penis and lives his life just to have them all published in an on line dictionary of slang.
Oh my! You knew that another word for penis is pennyprick! How immature of you to try publish it.
by Tenarr June 22, 2005
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Just because you're in high school doesn't mean people cannot be immature. Maturity is nothing but a mere joke.
by StraightFMan April 10, 2006
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the act of being immature
Your actions are full of immatureness
by ron January 18, 2005
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Someone who thinks vulgar words are funny. Most children exhibit this behavior.
Child: I drew a butt! Ha ha ha! Me: That's not funny. That's immature.
by spel itt rite January 16, 2006
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someone who cannot control their emotional behavior
Some people can act immature when they feel they are attacked.
by Gerard Irick March 24, 2010
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by revisiting old posts we were able to witness the immaturation of the internet from a place of cordial dissent to whiny bickering.
by kris takahashi August 26, 2009
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