A wildcard in cats is a feline that is:

1. Unpredictable in behavior
2. Playful and mischievous
3. Independent and stubborn at times
4. Curious and exploratory
5. Adventurous and loves to investigate
6. Quick-witted and clever
7. Affectionate on their own terms
8. Prone to sudden mood swings
9. Loves to test boundaries and challenge owners
10. Always keeping their owners on their toes!

Some breeds that might be considered wildcards include:

- Bengal
- Abyssinian
- Siamese
- Oriental Shorthair
- Maine Coon
- British Shorthair

However, remember that every cat is an individual, and even breeds known for being wildcards can have calm and gentle personalities. Get to know a cat's personality and temperament to determine if they're a wildcard or not!

Some signs of a wildcard cat include:

- They knock over objects just for fun
- They suddenly dart around the room
- They steal small items and hide them
- They wake you up at odd hours demanding attention
- They have a mischievous glint in their eye!