Jimmy Fallon tried to suppress his laughter when Will Ferrell called him a "fat-faced cob nobbler"

By Kathy Ehrich Dowd
Updated February 16, 2016 11:20 AM
Credit: Andrew Lipovsky/NBC

It’s a tight pants-off!

Will Ferrell once again donned a pair of tighty whities (the other kind) while sporting a Dorothy Hamill hairdo and groovy ’70s vibe while warbling an ode to “White Pants” on The Tonight Show Monday.

Christina Aguilera joined the Zoolander 2 star onstage as his white-pants-wearing wife, and also sang her love for the skintight garment.

Things appeared blissful until Jimmy Fallon appeared onstage, staunchly singing that his white pants are superior.

When the duo snootily retorted that their new baby had been deemed “the heir to the tight pants throne,” the late-night host shot back that the baby might, in fact, be his.

Afterward, Fallon tried his best to suppress giggles when Ferrell threatened him, calling him a “fat-faced cob nobbler.”

How did this tension filled moment resolve – and why did The Voice host belt out a fierce line from The Lion King? Watch the full video to find out.