look up any word, like doxx:
 
1.
Gerna is a sentance filler/enhancer used in Northern California dialect, specifically Humboldt County. Sometimes used at as a substitute adjective like "shitty" or "crappy". The higher excitement level, the more frequently the word appears in a sentance.
Moderately excited usage: "That darn gerna cell site ain't gerna no good."

Highly excited usage: "Gerna darn gerna gerna cell gerna site gerna ain't gerna no gerna good."
by DJ Dan K March 22, 2007