The 'Om Nom Nom Nom' meme is an onomatopoeic phrase used to represent the sound of enthusiastic eating. It gained massive internet popularity in the mid-2000s, largely attributed to the Cookie Monster from Sesame Street and early lolcat culture. The phrase typically accompanies images of animals, people, or even inanimate objects that appear to be devouring something with great gusto. Over the years, it has evolved from a simple image macro into a universal reaction for anything delicious, satisfying, or hilariously gluttonous, remaining a staple of internet slang and wholesome humor across social media platforms like Reddit and Instagram.