Hot mom means sexy mom; deduce that to mean mom I'd like to have
sex with; regard that statement as Mother I'd Like to
Fuck, hence the terminology: MILF.
Joey: Wow, Ross, your ex-wife Carol is one
hot mom.
Ross: You're talking about my son's
mother.
Joey: Hey, I call 'em as a I see 'em. I'm sure Susan will agree that she's a
MILF.
Ross: Shut up!