to  cross  one's fingers
cross
krɒs
kros
<i>one's</i>
wʌnz
vanz
fingers
fɪngəz
fingēz
[keep] {one's} fingers crossed

Definition & Meaning of "cross one's fingers"in English

to cross one's fingers
01

to hope for good luck or a positive outcome, often literally or symbolically overlapping the middle finger over the index finger 

Examples
"I'm crossing my fingers that I get the job!" she said before the interview. 
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