a peekaboo guard

Back-formations, such as tambour (for play the tambourine), are a staple of comedic wordplay.

If you get too close it'll trigger. Shoot it from a safe distance and it will blow up. … Leave the room and go through the door that was previously protected by a proxy mine.

His endeavor was to pemmicanize ideas, as the northpole explorers did provisions, that they might be carried about the easier.