Definition of scurrilous 1a : using or given to coarse language b : vulgar and evil scurrilous imposters who used a religious exterior to rob poor people — Edwin Benson 2 : containing obscenities, abuse, or slander scurrilous accusations
adjective: scurrilous making or spreading scandalous claims about someone with the intention of damaging their reputation. "a scurrilous attack on his integrity"
•humorously insulting. "a very funny collection of bawdy and scurrilous writings"
