widely used norcal/bay area phrase used to describe an extended period of time. Could be anywhere from a few minutes to a few years.

Used much in the same context that others not from norcal use the word forever (eg) "We've been living here forever"
norcal person 1: It took you hella days to get over here.
norcal person 2: Yeah dude, I know. The traffic in the bay area blows.

norcal person 1: I haven't seen you in hella days! (usually 3 or more days... but it could even be years)
norcal person 2: hella
by starrystareyes June 24, 2010
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a very long time
Its been hella days since I last saw you.
by Anonymous October 21, 2003
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depending on the context of use this can mean any period of time from a few minuites to a very long time. It normally how ever means a long time.

it can also be a sign of agreament

guy 1: dude i haven't seen you in hella days.
guy 2: ya i know its been awhile

example 2:
guy 1: dude this is some hard shit
guy 2: hella dayssss
by norcal isdashit December 24, 2007
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