Definitions for "fishtail"
to have the rear end skid from side to side, out of control: -- said of automobiles or other vehicles.
Rear of vehicle swaying from side to side. Generally the result of traction loss.
Movement of the rear end of a car from side to side. Also a verb, as in, "His car is really fishtailing as it comes out of the turn."
Keywords:  sideways, airplane, tail, runway, slow
to slow down by moving the tail sideways, of an airplane.
slow down by moving the tail sideways; "The airplane fishtailed on the runway"
Keywords:  seam, slim, flange, sweep, lap
This style of skirt is a slim fitting sheath which flares out at center back seam only-sometimes has a sweep train at the knee level
a piece of metal extending beyond the flange at the lap area that might cause double seam difficulty
A fan shaped train of a dress.