General term referring to an individual who does not amount to your expectations. Numnuts becomes numnuts when he/she/they/feman/mailman/ steps out of line. To become a numnuts is to become wiped from the map of validation.
Buddy chirping nannies and tweeting aunties on dinner 11 eh? Humphrey is such a numnuts!
a extremely stupid person that needs mental help from a prefecinal. nemnuts are usually put in hospitals so they won't hurt there selves or anybody else