lem·on / ˈlemən/ • n. 1. a yellow, oval citrus fruit with thick skin and fragrant, acidic juice. ∎ a drink made from or flavored with lemon juice: a port and lemon [as adj.] lemon tea. 2. (also lemon tree) the evergreen citrus tree (Citrus limon) that produces this fruit, widely cultivated in warm climates. 3. a pale yellow color. 4. inf. a person or thing, esp. an automobile, regarded as unsatisfactory, disappointing, or feeble.DERIVATIVES: lem·on·y adj.
the answer is a lemon the response is unsatisfactory.
hand someone a lemon pass off a sub-standard article as being of good value.
lemon law in the US, an informal term for a law designed to provide redress for buyers of faulty or substandard cars.
See also if life hands you lemons, make lemonade, oranges and lemons at orange.
So lemonade XVII. — F. limonade.