A word originating in the San
Francisco Bay Area and used by Northern Californians. It is often a symbol of
one's Bay Area
words. It is a word of convenience, since it can be used in many parts of speech. As an adjective, it means "a lot of, many, various." As an adverb, it means "really, actually, very, in a high degree." It may also mean "I agree."
It may be useful to note that the expression "hella days" usually denotes a length of time much longer than several days.