Sand bagging

[Tanya Shivari]

A word usually used by Truckers meaning slow driving or taking ones time.

[Zipporah Schumaker]

To deliberately perform at a lower level than you are capable of

[Zipporah Schumaker]

Used in street racing. It means to be cheated out of a race or the opponent purposefully slowing down so the margin of victory seems smaller then it actually was.