Dayo

A state of overwhelming excitement. So much so that your body reacts in a physical manner of which you have no control, such as short quick spasms, or a burst of stretching every appendage.
Dayo is when your body physically cannot contain excitement and reacts to release the energy.

Nice

has turned to joy. a condition whereby happiness is a result. It is also a name of a person from Yoruba land.

Da(give/advice in sanskrit) Yo(Woman) Indian word for a woman who likes to quote sanskrit quotes on working hard a lot, and likes to give a hard time to people who she thinks are being insolent.

Fun person to be with except this one idiosyncrasy.

Pain.

Meaning (translated to English): Its a lie
Language: Japanese

Fictional character who says this the most: Kokichi Oma
Who is kokichi Oma: He is a fictional charater from the game Dangaronpa V3 killing harmony

In japanese, expression showing the full satisfaction obtained by eating, drinking or tasting anyway, somethings really delicious (delicious is what oishii properly means), mostly, but not necessarily, related to food or drink.
Coming from the Imperial Family and the noble class of the Heian period (794-1185 AC), it's still mainly used among highly educated people and academic circles, as a way of very polite and formal appreciation, sometimes just in order to mark the intellectual superiority from the common way of speaking.