facetious

"The comedian's jokes were humorous, making the audience laugh. "

"I appreciate your efforts"

"It is inappropriate to burp at a formal dinner."

"Workers are usually paid extra for working overtime."

"It was a surprise to see the captain, who had always seemed so serious, laugh so heartily."

"He smiled pleasantly at passersby."

"When asked about the serious accident, the teenager gave a flippant answer, as if it were no big deal. "

"The union representatives are currently treating with the company about better wages and benefits for the workers. "

"My discussion with the professor was very enlightening."

"While walking to school, Sarah found a lost wallet on the sidewalk. "

"I have no comment on that."

"To avoid a fight, Sarah deliberately walked a different route to school today. "