Your request was inubus which is probably a typo from incubus.
inubus -
Traditional English :: incubus
inubus - n. (pl. incubuses or incubi) 1 an evil spirit supposed to descend on sleeping persons. 2 a nightmare. 3 a person or thing that oppresses like a nightmare. [ME f. LL, = L incubo nightmare (as INCUBATE)]