Hufen flufen

A German sound of exasperation or utter exhaustion, coined by Niklas and Marisol in Cologne, Germany, December 2018. Marisol's original "harmless" made-up sound of exasperation ("hughen", spelled "huren") turned out to mean "whores", so she reverted to hoofen floofen, which Niklas then told her was misspelled, even though it was a fictitious term. Bah! Hufen flufen.