What is Rub some dirt on it?

To rub dirt inside a wound in order to help the blood clot. Also used as an expression telling someone to get over any physical injury or other pain.

Jimmy broke his leg? Tell him to rub some dirt on it and get back on the court!

Rub some dirt on it - video

Rub some dirt on it - what is it?

To suck it up or man up in any kind of situation.

You don't want to go out tonight because you're tired? Rub some dirt on it!