Tracey’s question: “Is it fingers crossed or finger’s crossed or fingers’ crossed?”
BizWritingTip response: This idiom describes a hand gesture in which the middle finger of either hand is crossed over the top of the index finger of the same hand. When we cross our fingers, we are hoping or wishing that things will happen the way we want them to.
Apostrophes indicate either possession or a missing letter or letters. In this phrase, neither possession nor missing letters occur. Therefore, it would be incorrect to insert an apostrophe.
Are your fingers crossed for the return of good weather?
I’ll cross my fingers that it stops raining.