Tup \Tup\, v. t. & i. [Probably akin to top summit, head.]1. To butt, as a ram does. [Prov. Eng.]
2. To cover; -- said of a ram. --Shak.
Source: Webster's Revised Unabridged Dictionary (1913)
Tup \Tup\, n. (Zo["o]l.) A ram.