fishtail

Short definition from Wiktionary

Noun

1. 1
   The tail of a fish, or an object resembling this.
2. 2
   The skidding of the back of a vehicle from side to side.
3. 3
   A kind of chisel with a flared blade.
4. 4
   Ellipsis of fishtail palm.

Verb

1. 1
   To swing the back of a vehicle (originally an aircraft) from side to side.
2. 2
   To cause the back of (a vehicle) to swing from side to side.
3. 3
   To move with the tail swinging from side to side in this way.