the.com/prankster

means A person who habitually plays practical jokes or tricks on others, usually for amusement rather than harm.

from Built from 'prank' (a mischievous trick, known since the 1500s, origin itself uncertain) plus the agent suffix '-ster,' which English has long used to name a doer of something — as in 'trickster' or 'gangster.' 'Prankster' itself is a relatively young coinage, only catching on widely in the 20th century, as if the behavior needed centuries to finally earn its own job title.