A stupid or silly person.
Any of several stout-bodied, gregarious terns of the genera Anous and Procelsterna, found in tropical seas.
An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; used for detecting and measuring slight horizontal vibrations of a body to which it is attached.
A cutaway scene of a television interviewer nodding, used to cover an editing gap in an interview.
A foolish, annoying or incompetent person.
A toy consisting of a spheroidal or cylindrical spindle having a circular groove in which string is wound; it is used by holding the string in the fingers and reeling the spindle up and down by movements of the wrist.
A cloth rosette formed by gathering the outside edge of a circle of fabric in toward the centre using a running stitch.
Someone who vacillates.
A dogfighting maneuver involving the attacker temporarily exchanging altitude for airspeed, or vice versa, in order to rapidly catch up with the defender or to prevent an overshoot.
A volatile market that moves up and down.
To vacillate; to move up and down.