Definition

Classic slang from the '60s (and later Boston-area staple) meaning extremely cool, awesome, or impressive. Originally surfed its way through Southern California before becoming a New England linguistic trademark—because sometimes "very" just doesn't cut it when describing how rad something is.

Example Usage

That vintage motorcycle you restored is wicked cool, dude!

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=wicked&defid=2583324)