Dandere, oftenly confused with kuudere, is a common anime trope used to describe people who are often quiet and extremely shy towards people they like. Despite this, once they do start to conversate (usually awkwardly) with the one they admire, they become more open and less shy.
The reason this is confused with the definition kuudere is because both tropes hardly talk, and occasionally show their more open side. A kuudere is someone who is often emotionless and clueless, but will sometimes show their loving and kind/sympathetic side.

A character that is a dandere: Hinata Hyuga from Naruto.
A character that is a kuudere, not a dandere: Kanade Tachibana from Angel Beats!
dude: "ahahaa, *insert name here* is such a dandere. she hardly talks but she's for some reason really nice and open to me. rarely, though."

dude 2: "man, you are so lucky."
by iiToxicMinded November 28, 2016
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Someone who has a shy and typically meek personality but who can become bolder and more open toward their love interest if made to feel comfortable enough.
"Dandere" is a combination of two Japanese terms: “danmari” (keeping silent), and “dere-dere” (to be lovey-dovey). The dandere is a popular character trope in anime.
by IntrospectiveLiz March 09, 2021
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one who has his "dander" up,
"aw, pops, dont get yer dander up...jeez that old guy was a danderous mother."
by Mellowphotog December 12, 2011
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The spot between your balls and your pillypacker.
by Vikki The Rhino August 27, 2006
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