No, the word you are looking for is "expletive", a word often used at the time of the Watergate scandal. "Explicative" is an adjective which means "tends to explain."

Jesus (explicative) Christ On A Pogo Stick

A joyful explicative mostly directed from and @JimCarrey.

Different types of definitions include stipulative, descriptive, explicative, real, and nominal.

"Whew" is not a pronoun or a preposition. It is an interjection used to express relief, exhaustion, or amazement.