The line comes from the 1999 South Park episode The Succubus, where Chef's father repeatedly tells how the Loch Ness Monster kept disguising itself to ask for three dollars and fifty cents. Fans clipped the tree fiddy phrase and shared it as a standalone reaction on forums and video edits. Its lasting appeal is the absurd escalation: a legendary monster reduced to panhandling for small change, which makes it perfect shorthand for any cheap scam or unexpected handout request online.