Mackintosh - A Mackintosh is the smell of a room when nobody knows what i

A Mackintosh is the smell of a room when nobody knows what it is, like it’s trying to be a mystery but nobody cares.

That smell in the classroom is a Mackintosh.

You walked into the gym and it hit you like a Mackintosh.

The lunchroom smelled like a Mackintosh after the pizza was left out too long.