It all began when the "Big Bang Theory" star told Ellen about the tattoo her "very conservative" dad had recently gotten as a present to her mother for Mother's Day.
When asked what her mom said about the indelible gift, Cuoco said her mother was worried that the tattoo would have a bad influence on her and her sister.
However, when Ellen asked if she's ever consider getting inked, the 27-year-old actress revealed she already had.
"It's a tramp stamp. Of course." said Cuoco admitting she was only 17 when she got it. "I was trying to be cool. I know, so dumb… but, I forgot I even had it. It's way far back there. It's kinda far back. It hurts my neck now to see back there."