dingus
Concise Oxford English Dictionary © 2008 Oxford University Press:
dingus /ˈdɪŋəs/
▶noun (pl. dinguses) N. Amer. & S. African informal a thing one cannot or does not wish to name specifically.
– origin C19: via Afrik. from Du. ding ‘thing’.
'dingus' also found in these Oxford entries:

