from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Resembling or suggestive of the tail of a fish in shape or movement.
- intransitive v. To have the rear end of a forward-moving vehicle swerve from side to side out of control: The truck fishtailed on the icy road.
- intransitive v. To swing the tail of an airplane from side to side in order to reduce speed.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The tail of a fish, or an object resembling this.
- v. To swing the back of a vehicle (originally an aircraft) from side to side.
- v. To move with the tail swinging from side to side in this way.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. to slow down by moving the tail sideways, of an airplane.
- intransitive v. to have the rear end skid from side to side, out of control: -- said of automobiles or other vehicles.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. slow down by moving the tail sideways
fish + tail (Wiktionary)