Loo \Loo\, v. t. [imp. & p. p. Looed; p. pr. & vb. n. Looing.] To beat in the game of loo by winning every trick. [Written also lu.] --Goldsmith.
Source: Webster's Revised Unabridged Dictionary (1913)
Lu \Lu\ (l[=u]), n. & v. t. See Loo.