Unclaimed item/belongings that have been left at a party unintentionally by an individual (i.e. jacket, hat). Often times the host of the party will have a grace period for when the said person can come back and retrieve their item/belongings, however once this period passes the party host assumes ownership of the goods and can alternatively give it away. "The 8 day grace period"
Matthew: Check out these party leftovers; a hat, scarf, and a woman's size 3 Armani blazer.
Erin: That's my favorite size and my favorite brand of blazers - may I take this blazer?
Matthew: Haha, well it is pass the 8 day grace period so it's yours now.
When morning penetration is effortless due to the slather of lube that has remained in one or more orifices since the night before.
I was supposed to be preparing for my job in the morning, but it was way too easy to just roll onto my side and slide into the lubed up leftovers from last night.
The period of time that it takes to get a nasty whore warmed back up ready to bang the next guy after taking a breakin between sex with multiple partners.
Walter: Dude, come in here and bang Cathy. It's your turn. Howard finished about 10 minutes ago.
Clarence: Is she ready to go?
Walter: Oh yea she is Warming The Leftovers.
The act of taking a shit into a womans vagina then wrapping it closed with saran wrap until you are sure its stuck in there. After that wait up to 3 weeks take the saran wrap off and eat the woman out.