To play a prank on his brother, Matt replaced the Windows system sounds with the voice that would eventually become Homestar.
A guy decided to prank his girlfriend of five years by telling her he cheated on her.
Everyone thought it was sweet; not so sweet when, as a prank, he began placing firecrackers in the neighbors' mailboxes.
"a ludicrous trick" [Johnson], 1520s, of uncertain origin, perhaps related to obsolete verb prank "decorate, dress up" (mid-15c.), related to Middle Low German prank "display" (cf. also Dutch pronken, German prunken "to make a show, to strut"). The verb in the modern sense also is from 1520s. Related: Pranked; pranking.