Wiktionary
tumblebugs
n. (plural of tumblebug English)
Wikipedia
Tumblebugs
Tumblebugs is a fast-paced puzzle game developed by Wildfire Studios. It can be purchased for a number of platforms, including most recently iOS and also Windows and Mac OS X,. The sequel was also released as a WiiWare game. Coming soon for the PlayStation 3 (PSN) and Xbox 360 (XBLA).
Usage examples of "tumblebugs".
Gaines and Harvey mounted tumblebugs, and kept abreast of the Cadet Captain, some twenty-five yards behind the leading wave.