When someone questions you repeatedily about a certain topic, and you wish they'd just shut up about it.
"Quit givin' me the 3rd degree about the party, okay? Nothing happened."
by Stud April 11, 2005
a session of questioning especially a long or harsh one
My mom gave me the 3rd degree when she saw the stain on the bed.
by The Return of Light Joker December 27, 2007