■ verb ( ~s , ~ping , ~ped )
1》 move or be moved up and down or to and fro.
2》 ( ~ at ) strike at loosely.
3》 Brit. informal be agitated.
■ noun
1》 a piece that is attached on one side only.
2》 a hinged or sliding section of an aircraft wing used to control lift.
3》 a single ~ping movement.
4》 informal a state of agitation.
5》 a large broad mushroom.
Derivatives
~py adjective
Origin
ME: prob. imitative.