Euphemistically commenting:

"I expletive hope he expletive chokes on those expletive pretzels."

Expletive meaning "curse word" :

"Every other word that he says is an expletive."

"It is easier to use an expletive than to think of an appropriate word."

"Naming your dog after an expletive and yelling it in public is not a good idea."

Also

(for the meaning, added merely to fill out a sentence or line, or give emphasis)

"The speech was padded with expletive remarks and comments."

(given the popular connotation, the other meaning for the term is rarely used)