6 letters · 8 points in Scrabble
originProbably of multiple origins. Partly a borrowing from Dutch dinges (“thingamajig, thingy; whatshisname, whatshername”), ding (“thing”). Probably also partly a borrowing from Afrikaans in view of its South African occurrence. The spelling dingus is remodeled to look like a Latin word ending in -us.
Etymology from Wiktionary, CC BY-SA 3.0