2 definitions by Emigoodish

Top Definition
n. a mature person who acts immature. The person wears an immaturity shell to hide their true personality, either out of insecurity or detest of other mature persons. This immature shell protects the secretly mature person from responsibility and from the company of dull people.
Emily was shocked to discover that her boyfriend was intelligent and responsible, even though he acted foolish the majority of the time. It became apparent that under his jackass shell, he was a maturtle.
by Emigoodish June 29, 2011

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n. the condition of being an ass named Jonathan; to achive this condition, the Jonathan must be unquestionably retarded, inconsiderate, or offensive. This doesn't necessarily make the Jonathan a bad person, but it probably is one.
Jonathass: "Did I ever tell you that I used to have a big brother, but he died?"
Naive conversationist: "Oh my gosh! I'm so sorry! That explains why you act like an ass!"
Jonathass: "Hahahaha. I'm glad you believed that piece of BS."
by Emigoodish June 29, 2011

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