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?"
ii) -"Tom just dropped his sausage roll!"