When bodies move quickly in motion towards each other, occasionally their contact enters the troubling strata of "cheapness".
It's a difficult notion to pin down, but you can bet NFL Commissioner Roger Goodell is holding a lot of important meetings about it.
Luckily, we can skip those meetings and learn to just know them when we see them.
Here are twelve of the worst NFL cheap shots (with video!) from the past few years. Study them well, sirs and madams.