Similar Words to Jackknife Clam:
Knife-handle
Razor Clam
Examples:
1. You haven't got any more backbone than a steamed clam.
Definitions of Jackknife clam:
1. Marine clam having a long narrow curved thin shell
Knife-handle
Razor Clam
1. You haven't got any more backbone than a steamed clam.
1. Marine clam having a long narrow curved thin shell