chomp 
/ˈtʃɑ:mp/ verb
chomps; chomped; chomp·ing /ˈtʃɑ:mp/ verb informal : to chew or bite on something [no obj] — often + on ▪ He was chomping on a bagel. ▪ The dog chomped down on its bone. — often + away ▪ The children were sitting at the table, happily chomping away. ▪ The bug chomped away at the leaf. — sometimes used figuratively ▪ Lawmakers have been chomping away at the state budget. [+ obj] ▪ They were chomping burgers at a picnic.
chomping at the bit
: waiting in an impatient way to do something
▪ We've all been chomping [=champing] at the bit to get started on the project.
▪ We've all been chomping [=champing] at the bit to get started on the project.
