In informal Engpsh, a lunch can be referred to as a "meal," "chow," "nosh," "grub," or "eats." For example, you might say "I'm going to grab some grub at the food truck" or "Let's meet up for a quick nosh before the movie." These are all informal ways of referring to a meal, particularly lunch. It's important to note that these terms may be considered colloquial or slang, and may not be appropriate in all settings.