Definition of "scurrilous"

She said Johnson was “a better man than many of your detractors will ever understand”, adding that it was “so desperately sad that you let yourself down by making a scurrilous accusation against the leader of the opposition”.

2022 February 3, Heather Stewart, quoting Munira Mirza, “Boris Johnson’s policy chief quits over PM’s ‘scurrilous’ Savile remark”, in The Guardian‎

"Some days, I try to imagine how scurrilous it would be for a left-leaning government in Canada to embark on such a costly political agenda for, say, a 10-year period, and still find itself unable to convince Canadians that the majority have benefited from this."

2013, Alex Himelfarb, Jordan Himelfarb, Tax Is Not a Four-Letter Word: A Different Take on Taxes in Canada‎