[kou] 
) kine. | 1. | the mature female of a bovine animal, esp. of the genus Bos. |
| 2. | the female of various other large animals, as the elephant or whale. |
| 3. | Informal. a domestic bovine of either sex and any age. |
| 4. | Slang: Disparaging and Offensive. a large, obese, and slovenly woman. |
| 5. | Offensive. a woman who has a large number of children or is frequently pregnant. |
| 6. | till or until the cows come home, for a long time; forever: You can keep arguing till the cows come home, but I won't change my mind. |
| cow 1 (kou) n.
[Middle English cou, from Old English cū; see gwou- in Indo-European roots.] cow'y adj. |
till the cows come home
Also, when the cows come home. For a long time, as in You can keep asking till the cows come home, but you still may not go bungee-jumping. This term alludes to when the cows return to the barn for milking. [Late 1500s]