A St Catherine motorist learnt the hard way that what happens inside a courtroom can come at a hefty price after he was slapped with a $100,000 fine for uttering an expletive moments after being fined for a traffic offence.

Oscar Simpson found himself back before the St Catherine Parish Court on Tuesday after his outburst caught the attention of the presiding judge.

According to reports, Simpson had appeared before the court on a traffic violation and, after being fined, uttered indecent language inside the courtroom.