Calculate a baseball player's batting average. Calculating a baseball player's batting average is not a difficult task at all. A batting average represents the percentage of at bats that result in hits for a particular baseball player. The formula is: That's all there is to it.
To fly under the radar means to act in a way so as to actively avoid detection. It is the opposite of 'in your face'. There is an element of getting away with something but it is not necessarily bad.
The word chemtrails is a knock off of the word contrails.. Contrails are trails of condensation that can be seen in the sky when a jet airplane is traveling at above 30,000 feet altitude.