1.adverb(chiefly Northern California) Intensifier, modifying verbs; to a large extent; totally; very much.
"I can't tell you how much I hella love the new track."
2.adverbIntensifier, modifying adjectives; to a large degree; extremely; exceedingly.
"I guess she seems hella stoned in her commercial."
3.pronoun(chiefly Northern California) A lot; very much.
"We paid hella for that Chinese cuisine."
4.interjection(chiefly Northern California) For sure; totally; hell yeah; used as a strong affirmation of something that was just said, accomplished, or revealed.