How do you spell batmitten?

"Batmitten" is not a real word in the English language. It's likely a misspelling or a made-up word.

Are you perhaps thinking of:

* "Batting" which refers to the act of hitting a ball in sports like baseball or cricket.

* "Mitten" which is a type of glove that covers the whole hand and has only one opening for the thumb.

Could you please provide more context or clarify what you're looking for?