What is the slang word for yes?

I'm curious, what is the colloquial term that people often use as a substitute for the affirmative "yes"? It's a common slang word that has become widely accepted in informal conversations. Do you know the one I'm referring to? It's short, catchy, and can convey agreement in a casual setting. So, tell me, what's the slang word that we often use to signify a positive response?