(noun)A plastic cup filled with a beverage (often coffee) which is left to go cold on a victim's desk in the hope that they will accidentally knock it over. The perpetrator of the livesey will claim that they intended to drink it, thereby abdicating the consequences.
(verb)To entrap a victim using a livesey(noun)
Coined in 1989 after a persistent liveseying offender
(noun)"Who left this bloody livesey on my desk?"
(verb)"Aargh! My keyboard has been liveseyed!"