Pronunciation: [lˈuːz lˈʌnt͡ʃ] (IPA) 
The spelling of the phrase "lose lunch" may confuse some English language learners because the "oo" in "lose" is pronounced differently than the "u" in "lunch." "Lose" is pronounced as /luːz/ with a long "oo" sound, while "lunch" is pronounced as /lʌnʧ/ with a short "u" sound and "ch" sound at the end. Despite the different spellings and pronunciations, "lose lunch" means to vomit or feel nauseous from something eaten earlier.
"Lose lunch" is an idiomatic expression used to describe the act of vomiting or regurgitating the contents of one's stomach, generally due to feeling nauseous or experiencing extreme disgust or revulsion. This phrase is often used colloquially to reference a person becoming physically ill or nauseated to the point of vomiting.
The term "lose" here signifies the act of forfeiting or involuntarily expelling the contents of one's stomach, while "lunch" specifically refers to the meal typically consumed around midday, suggesting that this occurrence is tied to the disgorgement of a recently eaten meal. However, it is important to note that the phrase is not exclusively limited to the expulsion of food consumed during lunchtime; it can be used more broadly to describe the act of vomiting after any meal or consumption of food.
The expression "lose lunch" is often employed in informal contexts or light-hearted conversations, and its usage is predominantly conversational rather than in formal writing. It is an idiomatic phrase that vividly portrays the physical reaction of vomiting, commonly associated with sensations of disgust, repulsion, or extreme sickness. The phrase can also be used metaphorically to describe intense feelings of disappointment or shock that evoke a similar gut-wrenching reaction.
