The 'Grandpa Simpson Walking In and Out' meme is a classic clip from the Season 8 episode of The Simpsons titled 'Bart After Dark.' In the scene, Abe Simpson enters a burlesque house, sees his grandson Bart working at the front desk, and immediately turns 360 degrees to pick up his hat and walk right back out without saying a word. This sequence has become the universal internet shorthand for entering a situation—whether it's a social gathering, a digital chat room, or a real-life event—and instantly regretting it upon seeing something awkward or undesirable. It captures the essence of a 'nope' moment with perfect comedic timing.