the.com/shocker

means A hand gesture—pinky and thumb extended, middle fingers curled—used as crude slang for a sex act, now mostly flashed as a joke or meme rather than meant literally.

from The word 'shocker' itself is just the ordinary noun for anything startling, dating to the 1800s. The gesture's slang nickname rode in on that sense: it got its name because the hand shape was said to 'shock' whoever recognized what it implied. The phrase popularly linked to it—'two in the pink, one in the stink'—is internet-era folklore explaining the gesture's three-finger logic, not a documented origin story. The sign itself seems to have spread through oral/teen culture and then online forums and chain emails in the 1990s–2000s, which is why no single inventor or date can be pinned down with confidence.