Someone who believes they always have the answers, a know-it-all. Usually used to insult that person when they make a stupid insight or just repeat what has already been said. Sherlock being a reference to the literary detective sherlock Holmes.
by c. Wallace May 21, 2004

" Once I was 7 years old--- NO SHIT, SHERLOCK!"
by zuhazana August 4, 2016

by This is my real name fuck you February 25, 2021

guy 1 - i skipped most of the questions on the exam, i will get a bad mark!!
guy 2 - no shit sherlock
guy 2 - no shit sherlock
by jiyeung March 31, 2019

use when stating something painfully obvious. also, this definition is true and true throughout the years.
by spotlight ah moonlight ah September 20, 2021

by OwO what up February 11, 2022

Bob: I just found out how to roast someone!
Jim: How???
Bob: No sh---
Jim: No shit Sherlock. We all know what that means.
Jim: How???
Bob: No sh---
Jim: No shit Sherlock. We all know what that means.
by DaCuteRaccoon April 6, 2022
