hellacool en · ADJ
Etymology
hella + cool
Meanings
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(Northern-California, slang) Very cool (fashionable or excellent).
2019, Melisa N. Choroszy, Theodor M. Meek, Access for All: Expanding Opportunity and Programs to Support Successful Student Outcomes at the University of Nevada, Reno The ultimate compliment paid to the OSC was when a student characterized us as “Hellacool!” He did not like having to complete the terms of his sanction, but enjoyed his association with the staff in the office.
"Damn, dis is hellacool."
2006, M. Evelina Galang, One Tribe, page 237: