ace, or 'acetaminophen', is the 'street' name for paracetamol.
Mike: "Dang, I took a lot of ace last night. I was buzzed."
Joan: "You fucking serious? It's just paracetamol my guy."
Ace is an amazing person though sometimes a massive dickhead. It is a funny person and can make many people laugh! He can be a bit aggressive, such as murdering your son many times. He’s cool though
A very pretty girl
Other person "I like ace"
"No you don't, shut up she's mine"
ACE is often used for videogames such as Call Of Duty or any other shooter game, it means "All Champions Eliminated". So is when a man kills all the enemy team.
A : I'm worrying about my math test.
B : Chill out ! You're gonna ace it.