A type of prank that usually causes either physical injury,
psychological harm, or both. A prankless harm can be done
intentionally, but it is also
possible for it to be done unintentionally.
Person 1: Yoo, I pranked Jeremy so good
yesterday! I told him that I put goat sperm instead of half & half in his coffee and he totally
bought it!
Person 2: Dude,
that's fucked up, you probably made him paranoid for life. Talk about a prankless harm there.