An individual whose age indicates maturity but whose approach to life suggests otherwise.
Whenever my neighbor waters his shrubs, he wags the garden hose between his legs and waves to traffic. Total accidental adult.

I try not to laugh when children call me “Mr.” They have no idea I’m an accidental adult.
by Peeper Winkman April 27, 2010
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A theater that only plays pornographic movies(Gay or Straight). Seating varies but usually has at least one area(couch,platform, etc) for sex acts to be performed for the entertainment and/or participation by the theater patrons.
I went to the Adult Theater Friday night and there was a Woman there whos Husband was letting anyone have sex with Her. She couldn't get enough.
by Shades_1970 July 20, 2015
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A millennial adult, with or without kids, that can't stop talking about Disney, including the movies and the parks. Even if they do have kids, they're still way more obsessed with it that their kids ever would be. They probably engage in casual "Disneybounding" and visit the theme parks at least once a year. They are obsessed with everything Disney and probably have a Mickey Mouse bumper sticker and/or tattoo. One of the most terrifyingly intense people you'll ever encounter.
That Disney Adult over there won't shut up about theme park trivia
by annababechase January 28, 2021
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the best euphemism EVER for doing the deed...and then sleeping over.
Chuck and I had an adult sleepover last night.
by Gatho November 25, 2006
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a phrase usually said by parents as an excuse for hypocrisy.
mother : sweetie its time for you to go to bed give me your phone
15yr old : how come you get to be on your phone all day
mother : because im an adult
by DjDorian1 November 7, 2017
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The slang term for any type of e-cigarettes or vapes
Person 1: why did jimmy leave the party so early

Person 2: his adult pacifier ran out of juice so he got antsy and had to go buy more
by SuperSl1ck April 24, 2022
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