Gross Misconduct

Ontario New Democratic Party Caucus and COPE, Local 343 (Clee), Re, | 2017 CarswellOnt 16312 | Ont. Arb.

... the phrase “gross misconduct”... is best understood as the kind of behaviour for which warnings or progressive discipline is unnecessary because the misconduct is so blatant, so obvious, so brazen or so serious that any employee should understand that it would jeopardize their job ... [behaviours] such as theft, assault and sabotage [are] examples of gross misconduct.