What movie is the quote “You're slapping the bass, mama.” from?

Name: I Love You, Man
Director: John Hamburg
Genre: buddy film, romantic comedy
Released: 2009-01-01
Cast: Jaime Pressly, Jason Segel, J. K. Simmons, Vicki Davis, Sarah Burns

Question

Accepted Answer

“You're slapping the bass, mama.” is a line from I Love You, Man (2009).

"You're slapping the bass, mama."

Dialogue

What movie is this quote from?

More from I Love You, Man