Fonzie was the breakout character in Happy Days, the ABC sitcom that ran from 1974 to 1984, played by Henry Winkler as a leather jacket wearing greaser who became a pop culture icon. His Aaay, usually delivered with both thumbs up, was his defining catchphrase for approval and cool confidence. Decades after the show ended, the clip survives online as a reaction sound and meme shorthand, shared in edits and soundboards whenever someone wants a retro, instantly recognisable way to say everything is going perfectly.