fishtail /ˈfɪʃteɪl/noun 4verb 3forms 3 noun4 •The tail of a fish, or an object resembling this. •The skidding of the back of a vehicle from side to side. •Ellipsis of fishtail palm. •A kind of chisel with a flared blade. verb3 •To swing the back of a vehicle (originally an aircraft) from side to side.As we approached the runway, the pilot fishtailed slightly to reduce landing speed. •To cause the back of (a vehicle) to swing from side to side. •To move with the tail swinging from side to side in this way.A large black and gold butterfly fish-tailed in and landed on a hydrangea bush almost at my elbow, moved its wings slowly up and down a few times, then took off heavily […] — 1943 formsfishtailed · fishtailing · fishtails