1) A situation where there is no surveillance, and therefore, no one to see you TP that stupid memorial or whatnot.
2) A person who is really annoying or stupid, and deserves a prank to be pulled on them, prank ranging from stealing their glasses to pushing them into a freezing pool with their shoelaces tied.
3) Something that tempts a mind onto wicked thoughts and actions, and something that deserves to be messed with.
That sign was so prank-worthy, with all the right letters sitting there and absolutely no one around, I had to rearrange them to spell "hairy monkey balls"
Justin gets on my nerves all the time, so instead of just beating him up, I steal his iPod and dump ice cubes down his shirt. He's just that prank-worthy.
Don't leave that female manikin just lying around; it's just a little too prank-worthy.