'To be in one's cups' definitions:

Definition of 'To be in one's cups'

From: GCIDE

Cup \Cup\ (k[u^]p), n. [AS. cuppe, LL. cuppa cup; cf. L. cupa tub, cask; cf. also Gr. ky`ph hut, Skr. k[=u]pa pit, hollow, OSlav. kupa cup. Cf. Coop, Cupola, Cowl a water vessel, and Cob, Coif, Cop.]
1. A small vessel, used commonly to drink from; as, a tin cup, a silver cup, a wine cup; especially, in modern times, the pottery or porcelain vessel, commonly with a handle, used with a saucer in drinking tea, coffee, and the like. [1913 Webster]
2. The contents of such a vessel; a cupful. [1913 Webster]
Give me a cup of sack, boy. --Shak. [1913 Webster]
3. pl. Repeated potations; social or excessive indulgence in intoxicating drinks; revelry. [1913 Webster]
Thence from cups to civil broils. --Milton. [1913 Webster]
4. That which is to be received or indured; that which is allotted to one; a portion. [1913 Webster]
O my Father, if it be possible, let this cup pass from me. --Matt. xxvi. 39. [1913 Webster]
5. Anything shaped like a cup; as, the cup of an acorn, or of a flower. [1913 Webster]
The cowslip's golden cup no more I see. --Shenstone. [1913 Webster]
6. (Med.) A cupping glass or other vessel or instrument used to produce the vacuum in cupping. [1913 Webster]
Cup and ball, a familiar toy of children, having a cup on the top of a piece of wood to which, a ball is attached by a cord; the ball, being thrown up, is to be caught in the cup; bilboquet. --Milman.
Cup and can, familiar companions.
Dry cup, Wet cup (Med.), a cup used for dry or wet cupping. See under Cupping.
To be in one's cups, to be drunk. [1913 Webster]