jim's parents have gone away on holiday, so there'll be a big party at his place all weekend and everyone's going — it's gonna be a howler
beginning in the 1970s this was the popular term for a 'great party' in western canada
"jim's parents have gone away on holiday, so there'll be a big party at his place all weekend and everyone's going — it's gonna be a howler" What is the definition of "howler"?