Noun - Something or someone which endlessly spews rhetoric, slogans, or solicitations
Adj - Endlessly spews rhetoric, slogans, or solicitations
"If that grokster tries to sell me anymore of his religion, I'm going to crack his spinal column and drink out his precious marrow"
"Those grokster Girl Scouts always trying to pimp me cookies at this time of the year"
It can also be broken down and used as a word to mean basically anything (Grok, Grokin, Groked).
Most likely followed by a mumbling of the word davies.
Yo what are you guys doin? Just grokin it.
What are we gonna do? Grok it.