WWW- Sirius Satellite Radio, which is under no Federal Communications Commission content guidelines, has aired the first commercial to feature a “four-letter” word.

The commercial is for Sinus Buster, a hot pepper nasal spray. J.R. Gach, a longtime terrestrial radio deejay who has done Sinus Buster ads for years, this time calls it “the best s- that ever was.”

The request for the profanity was made by Wayne Perry, president of SiCap Industries, which makes Sinus Buster.

“It’s the way real people talk,” said Perry. “It’s not different than what you’d hear from a group of adults having any conversation.”

Perry said he thinks the results are “stupendous.”

The new spot first aired on Sirius’ Howard Stern channels, 100 and 101.

Perry described them as “channels where listeners already expected some tasteful profanity.”

Gach said, “Someday this technique will be commonplace.”