Bluffing
1) Betting or raising a a weak hand in hopes that all other players will fold
2) Semi-bluffing: betting or raising a drawing hand, like a flush draw, in the earlier betting rounds enabling you to sometimes
win the pot uncontested, but with the backup of being able to actually make the winning hand when more cards are dealt
3) Bluffer: a player with the reputation of bluffing often
4) Calling a Bluff: calling a player's bet
because you think they may be bluffing