What is Sheldon's catchphrase in The Big Bang Theory?

Sheldon’s catchphrase in The Big Bang Theory is “Bazinga!”

Sheldon Cooper, played by Jim Parsons, typically says “Bazinga!” after making a joke, tricking someone, or revealing a prank. The word highlights the contrast between his highly literal, analytical personality and his occasional enjoyment of playful mischief.

The catchphrase became closely associated with Sheldon during the show’s run from 2007 to 2019 and was even officially trademarked by Warner Bros. It is sometimes mistakenly treated as a general catchphrase for the whole series, but it belongs specifically to Sheldon. “Jinkies!” is associated with Velma in Scooby-Doo, while the other listed options are not recognized signature lines from Sheldon.

The word also inspired real-world names: Brazilian scientists named an orchid bee species Euglossa bazinga in 2012, honoring the character’s famous expression. In the show, Sheldon’s delivery and timing—not a fixed explanation of the word’s meaning—made “Bazinga!” memorable.