Chris Pratt and Jimmy Fallon Play Hilarious Holiday-Themed Game of Mad Libs Theater: Watch!

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Mad Libs can get very silly when you play with Chris Pratt! The Passengers star, 37, visited The Tonight Show on Tuesday where host, Jimmy Fallon, challenged him to a holiday-themed game of Mad Lib Theater.

MORE: Chris Pratt Visits Young Fans at Ronald McDonald House New York: 'I'll Have You All in My Prayers'

Naturally, the funnyman picked some ridiculous words like “nads” for a body part and “Ding Dongs” for a dessert.

And when it came time for the star to dress up as Santa Claus to Fallon’s elf, his carefully chosen words were put in a whole new context.

“Where were you the night before Christmas?” Pratt as Claus asked.

“I was with Pickles. We were listening to The Roots holiday album and making snow gerbils,” Fallon replied, laughing.

“Then why did Rudolph see you spanking on the roof?” Pratt continued as the pair burst out laughing.

WATCH: Jennifer Lawrence Reveals How She Prepared for Kissing Scenes With Chris Pratt in 'Passengers'

The jolly Santa then declared, “The reason I work so hard is because I get to spread joy to millions of people and go sit by the fire shaking my nad!”

Watch the clip to see the rest of the hilarious sketch, and for more on Pratt’s upcoming movie with Jennifer Lawrence, Passengers, watch the video below.