There are no emails for us to wade through—even if we were champing at the bits.
My two sons—Hugo and Thomas, ages ten and thirteen—are champing at the bit.
1868, American English abbreviation of champion (n.).
"to chew noisily," 1520s, probably echoic; OED suggests a connection with jam (v.). Earlier also cham, chamb, etc. To champ on (or at) the bit, as an eager horse will, is attested in figurative sense by 1640s. Related: Champed; champing. As a noun in this sense, attested from c.1600.