Stefon Diggs revealed an adorable nickname for his girlfriend, Cardi B, after the American rapper surprised fans with her appearance at the Week 9 game between the New England Patriots and the Atlanta Falcons.On Monday, she shared a glimpse of her outfit on Instagram. She shared a joint post with the NFL star and added a two-word caption along with red, white and blue heart emojis."PAT NATION," Cardi B wrote. View this post on Instagram Instagram PostDiggs dropped a sweet nickname for her in the comments section."Baby brim," Diggs commented.The NFL star also referred to the American rapper as his good luck charm."Goodluck charmmm, huh?" he wrote.Stefon Diggs debuts new nickname for GF Cardi B after she acknowledges Patriots nation for first time since dating star WR/@iamcardibCardi B shared a black-and-white picture with Diggs from the field, in which he hid her face as her long hair flowed down her back. She shared a few more photos of the couple, as well as a snap of Diggs’ celebratory dance move.Cardi B wore a brown oversized coat and carried a matching purse. She also wore knee-length boots and matching gloves. She also shared a picture with New England Patriots CEO Robert Kraft after the two were seen watching the game from the suite.With Cardi B in attendance, the Patriots edged out the Falcons 24-23 for their seventh win of the season.Stefon Diggs and Cardi B share a sweet moment on the fieldStefon Diggs’ girlfriend Cardi B made headlines for her appearance at the New England Patriots’ Week 9 game against the Atlanta Falcons. On the sidelines after the game, the couple shared an intimate moment. Diggs was spotted rubbing the budding baby bump of the rapper while they shared a hug.Cardi B had stirred controversy in June when she shared pictures with Stefon Diggs but later deleted the post. She opened up about the incident in her Sept. 23 appearance on the "Call Her Daddy" podcast."I’m very dramatic,” Cardi B said (via E!News). “That’s the thing. Something that to people is a big deal, to me, is not a big deal at the moment. And then it became something it’s not.”The couple is expecting their first child together.