I have seen this word DERRR with 3 "R's" and I looked up for the definition on many website but i haven't found like the exact definition Could you help me and give some examples to understand Thank you
In English it's not uncommon to take a word and repeat a particular letter from that word multiple times in order to simulate how it would sound if spoken. The intent is to add emphasis to the word, frequently for satirical effect. For example, Steve Martin's signature phrase from back when he did stand-up comedy:
Obviously "excuuuuuuuuuuuuuuuuse" is not a real word. The word is "excuse", but Martin would elongate the sound of the word to make it funny.
(Side note: I don't know why it was funny. As in any language, it's not just what many comedians say that's funny, but rather the overall effect from the combination of word choice, timing, body language, and context.)
"Derr" is a slang term used to imply the listener is or has done something idiotic. "DERRRRR!" is same word, emphasized for satirical effect. The caps and the exclamation point add to this. You don't often see this in writing, except perhaps with informal communication like texts, email, personal notes, etc. or as dialogue in a novel.