Normal: It was very hot and a lot of people went swimming.
Hella-fied: It was hella hot and hella people went swimming.
It can also replace "straight up" or "word".
Normal: Man, it's so hot!
Hella-fied: Man, it's hella hot!
Contraction of "Hell of..."
MEANING: "A lot of..." but not just in terms of quantity, but also magnatude.
*That greek def. (see above) is insane- whatever... "Hecka" was what a suburban loser from Walnut Creek (or Hayward) might say, simply because the word "Hell" as in "Hell-a" wasn't as commonly permitted in Sunday-school-going areas.
"His Vans are hella cool"
"Yeah... Jessie's hella fine"
Circa 1987 (B.H.S.)
"That party was hella weak"
"There were hella fools up here"
"He slings hella weed"
many- Hella people died that day.
a lot(of)- I had hella fun, but I gtg now.
a bunch(of)- He pwned hella n00bs last game.
It may be useful to note that the expression "hella days" usually denotes a length of time much longer than several days.
"I just saw hella people running out of that building, is there a fire?"
"I ate too much. I'm hella full right now."
"That was the best night of my life."
"Hella! Me too."