swear like a trooper
Freely utter profanity or obscenity, as in The teacher was shocked when she heard one of the fathers begin to swear like a trooper. The troopers in this term were the cavalry, who were singled out for their swearing from the early 1700s on.
Words nearby swear like a trooper
swear,
swear at,
swear by,
swear in,
swear jar,
swear like a trooper,
swear off,
swear on a stack of bibles,
swear out,
swear to,
swearing-in