blow (one's) lunch definitionand lose (one's) lunch
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lose one's lunch
Vomit, as in When Anne saw the wound, she thought she'd lose her lunch. This expression does not usually refer to a specific meal and probably survives because of alliteration. [Colloquial; c. 1940]
| a chattering or flighty, light-headed person. |
| a scrap or morsel of food left at a meal. |