The clip comes from New Girl, the Fox sitcom that ran from 2011 to 2018, where Jake Johnson played bartender and reluctant adult Nick Miller. Nick's whole arc is built around avoiding responsibility while insisting he has things under control, which is why this short declaration was lifted as a reaction sound. It spread through GIF captions, edits and soundboards as shorthand for ironic adulting, used whenever someone wants to celebrate a basic responsibility as if it were a serious life milestone.