Slash, or the Fake Bunt Swing
Show bunt, pull back and swing as the infield charges.
How it actually works. The show has to be early and honest enough to start the charge, and the hands come back to a choked grip rather than a full swing. The swing itself is short and downward, aiming for a ground ball past a corner infielder who is now thirty feet closer than he should be and moving in the wrong direction.
Why it is done, and when it is wrong. This is the counterpunch that keeps bunt defenses honest, and its value is almost entirely in the threat rather than the execution. A team that has slashed once in a season changes how every opposing third baseman plays every bunt for the rest of the year. Managers know this, which is why you sometimes see it called in a low-leverage spot: the payoff is not that at bat, it is the next twenty bunts.
What people get wrong about it. The contact is hard, and a lined ball at a charging infielder who is fifty feet away is the most dangerous batted ball in the sport. That risk is real and it is part of why the play has faded.
Batter's Eye: look up anything in baseball