rook 1 
(rk)
(rk)n.
1. A Eurasian corvid (Corvus frugilegus) having black plumage with a patch of bare skin around the base of the bill, and nesting in colonies near the tops of trees.
2. A swindler or cheat, especially at games.
tr.v. rooked, rook·ing, rooks
To swindle; cheat: Customers are afraid of being rooked by unscrupulous vendors.
[Middle English rok, from Old English hrōc.]