Also used as "Grungleshit, Grunglefuck, and Grungleschlaug"
When something is obnoxiously, or intensely rough. It is also used as an obscenity when something is wrong, similar to saying, "Ah shit" or "oh fuck".
I'M TAKING A GRUNGLESHIT!
He fucked me last nightand the bed moved an entire 5 feet away from where it should be, he grunglefucked me.
That is grungleschlaug!
The "smurf" of StL Yik Yak – an absurd multipurpose word often commented to dismiss or outright ignore the OP's sentiment.
OP: "My girlfriend just broke up with me. Life has no meaning."
Donut: "Grungle grungle"
Ambulance: "There are other grungles in the sea, OP"
Soda: "Reject meaning. Embrace grungle"