Kackalack
A loud, dumb, stupid noise made by a person who has zero brain cells and thinks they're the funniest thing ever.
He did a 'Kackalack!' after I told a joke that wasn’t even close to funny.
She did a 'Kackalack!' when the internet went down.
He did a 'Kackalack!' in the middle of a meeting and got fired.