Definitions by Hikari-chan

Interrobang 

A type of punctuation which in all technicality cannot be used in proper writing but who the fuck cares. Refers to both a question mark -hence the interro part- and an exclamation point (bang). Usually used by dumb young people when they cannot decide if they want to use an exclamation or a question mark. Also used as a title for a very amazing fan fiction on asianfanfics.

I recently learnt the uses of an interrobang.
What the fuck is an interrobang?!
Hey, you're using it too. Great job

Interrobang by hikari-chan November 10, 2014

desu 

While everyone thinks desu means "is". That's not what it means. It is added to the end of a sentence to make it sound polite. Assuming a verb in the sentence is not already in polite form.
Note: Most sentences to not need desu to be grammatically correct.

Bob wa byouki desu. (Bob is sick. The "wa" means is. Desu just makes it polite.)

desu by Hikari-chan December 16, 2008