The 'That's It I'm Gettin' Me Mallet' meme originates from the classic Cartoon Network series 'Courage the Cowardly Dog.' It features the character Eustace Bagge, an old, grumpy farmer who frequently loses his temper with his dog, Courage. Whenever a situation becomes too irritating or surreal, Eustace famously declares he's getting his mallet to settle the score. The meme surfaced in the late 2010s as a reaction image to express peak annoyance or to signal that a conversation or trend has gone too far and needs to be stopped. It is widely used on platforms like Twitter and Reddit to jokingly threaten 'bonking' someone for a bad take or an annoying behavior.