Wiktionary
time-waster
alt. 1 Someone who waste time. 2 Something unproductive. n. 1 Someone who waste time. 2 Something unproductive.
Usage examples of "time-waster".
Too many time-wasters, too many clowns who were more interested in grabbing a share of the limelight than playing a part in creating something special.
It so rarely happened, vastly outnumbered by hoaxers and time-wasters, but when it did—Let's not get ahead of the game, he told himself sternly.