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1.
verb:
A word used instead of eating
Person 1: Hey watchadoin???

Person 2: I'm nyuming my hot dog want to have some???

Person 1: Ok...
by cursed2bangel June 10, 2011
 
2.
an annoying noise you use when your hungry and cant be bothered eating
Danni: nyum nyum nyum im hungry but cbf eating
by Dicky™ May 21, 2009