also: オールマイティー
highest card; wild card
In card games, refers to the most powerful card, such as an ace of spades, or a card that can substitute for any other.
The ace of spades is the highest card.
He's an all-around employee who can handle any kind of work.
This tool can be used for almost anything.
In this game, the joker acts as a wild card.
In this game, the joker is used as a wild card.
This software can be used for just about anything.
無能 describes someone incompetent or lacking ability, the opposite of an オールマイティ person who excels at everything.
Standard katakana spelling; the most common form.
Variant with a long final vowel; less common but seen.
Borrowed from English 'almighty'.