skoo·kum [skoo-kuh m]
adjective, Northwest U.S., Canada.
1. impressive; incredible; strong.
2. excellent; high quality.
noun, archaic.
3. a street party.
Origin[]
1825-35, Americanism; < Chinook Jargon: strong, powerful < Lower Chehalis (Salishan language of the Washington coast) sk wək wə́m ghost, spirit, monster (hence, apparently “fearsome” > “powerful” in Chinook Jargon)