Sugoi (すごい) is a Japanese expression that can mean "awesome" or "awful" depending on context. It's said when one is shocked by something's awesomeness or awfulness and wants to express that feeling.
Origin[]
"Sugoi" is a term commonly used in Japanese literature and spoken language. It's used in a number of ways: to describe that something tastes good, that something is nice in general, to say that a boy is cute, to express that one is very excited about something, to say that something someone did or said was awesome or awful and to describe many other similar feelings.
Contemporary Usage[]
In the otaku fandom, the term is usually used in the positive context to express excitement or awesomeness. It can refer to waifus or husbandos as an adjective or something amazing that has happened in an anime or manga. Often, it is used with kawaii to describe something.