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1.
to eat something....mostly used as a term in Jamaica
Mi feel seh mi can nyam sum fish.

~~~>>(English)- I feel like i can eat some fish
by #1QueenBee July 03, 2005
 
2.
Australian slang.
i) An onomatopoeia used to describe the noise made when eating in a drunken or extremely hungry state. Its specific origin is unknown but is believed to have derived from the word ‘yum’.
ii) Plural can be used either as a derogatory exclamation or an attempt to draw attention to oneself.
i) -"How good would sausage rolls be right now?"
-"Nyam nyam!"
ii) -"Tom just dropped his sausage roll!"
-"Nyams nyams!!"
by Word Guru May 10, 2005