Yum

Yum, the classic word.

So you have nothing else to say, and you wanna be random and retarded, say yum.
Yummy
Yummiest

This word here can now be used to say something random like in a chat when it dies.

Texting guy 1: Chat's dead

Texting guy 2: yup

-Some random guy joins the chat-
The random dude: YuM

Texting guy 1: oh.