The "squeeze play" is an example of a preflop bluff, although it's a bit more involved than simply betting or raising with a weak hand versus a lone opponent. In fact, the squeeze play is a somewhat advanced move, requiring a little extra savvy and know-how to pull off successfully.
The easiest way to define a squeeze play is via an example. It's a $2/$5 no-limit hold'em cash game, and a player in middle position opens with a raise to $20. It folds around to the player on the button who calls the raise. The small blind next folds, then the player in the big blind puts in a reraise to $95.