improvised trolling device
a pipe bomb or other homemade explosive.
Alex put an improvised trolling device in James's mailbox after he threw the comp match.
Trolling Device
A quirky object used to bamboozle unsuspecting bystanders, otherwise known as an IED.
I engaged in a bit of tomfoolery by placing a trolling device inside this comically oversized envelope addressed to the nearest government office building.