General Excellence:
* "That was ace!" - Means something was excellent, great, or really good.
* "You're an ace at this!" - Means someone is very skilled or proficient at something.
Specifically in Card Games:
* "Ace in the hole" - A secret advantage or hidden trump card.
* "He aced the exam." - Means someone got a perfect score on a test.
Informal/Youth Slang:
* "That's ace!" - A casual way to say something is cool, awesome, or impressive.
* "Ace yourself!" - A way to encourage someone to do their best, often used in a friendly or playful manner.
Other Uses:
* "Ace in the sky" - A skilled pilot.
* "Ace of spades" - Can be used to refer to death, due to its association with the "Grim Reaper" in some cultures.
Important Note: The specific meaning of "ace" in slang can vary depending on regional differences, the speaker's age, and the context of the conversation.