Wiktionary
adv. hopefully
Wikipedia
Fingers Crossed is the first album by Australian indie pop band Architecture in Helsinki, which was released on 9 February 2003 by independent record label, Trifekta.
It is known especially for its gentle, high-pitched synthesizers and an ambitiously wide array of musical instruments, many unconventional and prominent. The instruments used include glockenspiel, woodwinds, xylophone, flute, four different kinds of guitar, trumpet, tuba, trombone, melodica, thumb piano, clarinet, recorder, bass, and various drums and percussion including hand claps, finger snaps, and the taps of tap shoes. It also uses a variety of voices, mainly in gender and age.
In 2007, "Souvenirs" received attention for its use in a Sprint Nextel commercial., and in 2009 excerpts from the song were used in a popular commercial for Fanta in the United Kingdom.
Usage examples of "fingers crossed".
I adjusted it, settled myself on it and cast off with my fingers crossed.
Clerve's fingers crossed the strings, and his clear voice brought the others into silence.
His fingers crossed his stubbly chin, but the chill was so great, even with the heat from the bathhouse stove, that he had not shaved, but only washed his face and hands, before hurrying back up to the tower's top level to dress for the cold day ahead.
And if you don't know any prayers, keep your fingers crossed till they ache.