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In MyMemeCards, the meme card game, “Why Don’t You Grow Up?” is a common card of the Brazilian Memes pack, number 256 of the collection, and the 1st best-known meme of its 300 cards. Here is what the meme means, where it comes from, and how to get its card.
What does the “Why Don’t You Grow Up?” meme mean?
The meme is used to mock someone who lectures others about maturity, by throwing their own words back at them in a ridiculous, childlike way. People post it under a comment that sounds preachy or condescending, turning the scolding into a joke instead of answering it seriously.
Where does the “Why Don’t You Grow Up?” meme come from?
The meme started on December 29, 2015, in a tweet from user @boudelaires (known as dimitri), who posted a made-up exchange: a serious question about maturity gets the same line thrown back, repeated in exaggerated childish, misspelled speech that mocks the scolding tone. The tweet barely circulated until November 5, 2016, when dimitri reposted the same exchange, this time paired with a photo of a boy whose expression fit the scene perfectly: the picture comes from an episode of the American sitcom Full House, where actor Miko Hughes plays Aaron Bailey, a friend of Michelle's. The next day, November 7, 25-year-old Vinicius Sponchiado created the Facebook page "Por que você não amadurece", which gathered 313,000 likes in under six hours, enough for Facebook to briefly block new likes on the page.
- 2015On December 29, dimitri (@boudelaires) posts the original dialogue on Twitter.
- 2016On November 5, dimitri reposts the dialogue with the boy's photo and the meme explodes.
- 2016On November 7, Vinicius Sponchiado creates the Facebook page, which hits 313,000 likes in under six hours.
How to use the “Why Don’t You Grow Up?” meme
- My boss lectured me about deadlines, so all I could think was: why don't you grow up?
- Her reply was so childish it looked like it came straight from that meme.
- Every time someone scolds me, I answer by imitating the kid from the why don't you grow up meme.
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The “Why Don’t You Grow Up?” card in MyMemeCards
| Number | No. 256 |
|---|---|
| Rarity | Common |
| Collection | Brazilian Memes pack |
| Fame | 50/100 · #1 of 300 |
| Recycle value | 5 MemeCoins (15 in Shiny) |
How to get the “Why Don’t You Grow Up?” card
Every pack holds 5 meme cards, the first 3 of them Common; Why Don’t You Grow Up? comes out of the Brazilian Memes pack as a common card. The pack odds say what each rarity weighs.
Your first pack is free and needs no account. After that a new free pack lands every 10 minutes, up to 3 waiting for you. You can also buy the card with MemeCoins on the market, bid for it at auction, or trade it — and a double recycles into 5 MemeCoins.
Open your free pack
5 meme cards, one of them at least Rare. One free pack per person.
Free · no account needed
Odds per card, averaged over a pack: Common 72%, Rare 23.9%, Epic 3.2%, Legendary 0.56%, Mythic 0.3%, Full Art ≤ 0.1%, Shiny 0.2%. Cards 1 to 3 are always Common, cards 4 and 5 climb the rarities. Rates drop for cards that circulate a lot. Details
Memes like “Why Don’t You Grow Up?”
More cards of the Brazilian Memes pack
Frequently asked questions
What does the why don't you grow up meme mean?
It mocks someone who lectures others about maturity, by echoing the same question back in a distorted childish voice.
Who is the kid in the meme?
It's Miko Hughes, the actor who played Aaron Bailey on Full House.
When did the why don't you grow up meme start?
The original tweet dates from December 2015, though it only went viral in November 2016.
How do I get the Why Don’t You Grow Up? meme card?
Open a pack of MyMemeCards: “Why Don’t You Grow Up?” is a common card of the Brazilian Memes pack. Your first pack is free, with no account, and you can also buy, trade or win the card at auction.
How rare is the Why Don’t You Grow Up? card?
It is a Common card. Rarity decides which pack slot can deal it, and what it is worth on the market.
Sources: Por que você não amadurece? – Museu de Memes · checked on November 6, 2026.
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