He's cool, she's hot

"Papa, what's cool really mean? And what's hot?"
"Ugh 'sejuk' and 'panas'..."
"That's what I thought. That's what my teachers say, too"
"So what's the problem?"
"This dude of mine. Whatever I do great stuff -- rolling, jumping and all -- he goes: you're 'cool', man... And one day I overheard Mr. X said to Ms. Y that Ms. Y is 'hot'..."
"Oh, I see. There's something called slang. Both 'cool' and 'hot' can mean good or great"
"That's confusing"
"I know"