Definition of throw-ins:
(v) :
(transitive) To hurl; to release (an object) with some force from one’s hands, an apparatus, etc. so that it moves rapidly through the air.
(v) :
(transitive) To eject or cause to fall off.
(v) :
(transitive) To move to another position or condition; to displace.
(v) :
(transitive, ceramics) To make (a pot) by shaping clay as it turns on a wheel.
(v) :
(transitive, cricket, of a bowler) To deliver (the ball) illegally by straightening the bowling arm during delivery.
(v) :
(transitive, computing) To send (an error) to an exception-handling mechanism in order to interrupt normal processing.