When a person ( or thing) is incredibly pumped or psyched about a certain something i.e. life, music,orange juice, forestry, or the mary jane etc. etc.
Dara: yo dude how u feelin?
Sierra and Kirsten: We are chalkin' so hardright now cuz-o-this candy right herrrrrrrrrrr
A person can also be a "charker" if they have done somethingimpeccably stupid. but it is usually not used in this sense unless there stupidity has been an annoyance.