H is O
Short for 'The Heat Is On,' a song by a guy named Glenn who probably thinks he's cool.
You're at a party and someone starts singing 'The Heat Is On' like it's the national anthem.
Your friend's phone is playing 'The Heat Is On' at full volume in the middle of a math test.
You're in the car and your mom starts singing 'The Heat Is On' like she's in a talent show.