A nilmoo is someone who interrupts you while you're doing something important. Nilmoos don't mean to be rude, they are just desperate for your attention, so give it to them. We love you nilmoos!!
by DERPEEDERP September 28, 2017
 Get the Nilmoomug.
Get the Nilmoomug.  Get the Nilmoomug.
Get the Nilmoomug.