An expression of eating, or a sound thereof. Also could mean a sexually suggestive action upon either a male or female, one would use the lips and not so much the teeth, avoicing a chomp chomp like action
I.E. Ow, this steak is good -Nom Nom-
Man, she was Nom Noming on me last night pretty good.
One who continuously appears to be "writing a message" when instant messaging. Gives the impression that the person is either hiding the truth, unable to make up their damn mind, or alternatively, is merely a shitty typist.
'...is writing a message' (for a lengthy period)
"Hurry the hell up, you damn phantom typist!"