Fool's cold

When a can or bottle feels cold on outside but is not because it was only recently added to the cooler.

Don't open that can, it's fool's cold!

Cold-hearted

Not showing any affection or warmth to other people; unkind.

There are some people can be well-mannered, and then there are some that can be very cold-hearted.

Cold nut

A "cold nut" is used to describe a sexual interaction with a female that bore no romantic feelings.

i.e. hooking up with a random and not calling her back. You have no intention of starting a relationship but you still
wanted to smash, so you give her a "cold nut"... a nut that lacked the warmth of love.

This would apply to hooking up with an ex that you no longer have feelings for.

It can also be the first major sign of a relationship in decline.

Example: "Man I wasn't into her but she was thirsting hard so I just gave her a cold nut."

Cold Candy

What rednecks call ice-cream.

Hey Brandine, go get momma some cold candy.

cold cash

ready money

I got the cold cash to pay for that car

cold gold

Miller High Life longneck

an iced out bottle of cold gold will hit the spot

Cold Ketchup

The remnants of blood on your dick from recently having intercourse with a dead woman that has been mensturating.

"Bro I had such a good time with my lady last night but the only problem is that I got cold ketchup on my dick"