[under wraps] {adv.} or {adj. phr.} Not allowed to be seen […]

[unknown quantity] {n.} Someone or something whose value and importance are […]

[up and at them] 1. {adv. phr.} Actively engaged in a […]

[up one's sleeve] or [in one's sleeve] {adv. phr.} 1. Hidden […]

[up to] {prep.} 1. As far, as deep, or as high […]

[up to one's ears] {adv. phr.} Immersed in; covered with. * […]

[vote a straight ticket] {v. phr.} To not differentiate one's ballot […]

[vote in] {v. phr.} To elevate to the status of "Law […]

[water over the dam] or [water under the bridge] {n. phr.} […]

[wear down], [wear off] or [wear away] {v.} 1. To remove […]