kuku'i ghost

[Justin McBride]

>> One of our speakers suggested it was a Mexican Spanish term, as her 
>> Mexican Mother-in-Law uses the term commonly in south Texas... but had 
>> not heard it used in the Omaha community.
>
> Doesn't sound like (even dialect) Spanish. The standard Sp. for 
> mother-in-law is suegra.

According to several uncredited Internet sources:

"El Cucuy [is] a gigantic bogeyman with a crooked back and a large, glowing 
red ear[s] who is known to come down from his cave in the mountains to carry 
bad children away."