Part of a Ray Charles Pepsi ad

• "Yeah, I guess"
• "That's right"
• Informal okay
• Equivalent of a pitcher's nod to the catcher
• "For sure!"
• Informal approval
• Slangy approval
• "Suuure ..."
• Grunty affirmative

Wiktionary Word definitions in Wiktionary
interj. (alternative spelling of uh-huh English)