Wango \Wang"o\, n. A boomerang.
wango /wang'goh/ Random bit-level {grovel}ling going on in a system during some unspecified operation. Often used in combination with {mumble}. For example: "You start with the ".o" file, run it through this postprocessor that does mumble-wango - and it comes out a snazzy object-oriented executable." [{Jargon File}]