Songfacts®:

• The first single from Meghan Trainor's Thank You album finds her giving the brush-off to a would-be suitor in a club. "It's a big anthem for ladies about telling a dude, 'Nah, I'm good - I'm out here on my own, and I'm good with it,'" she told Fuse TV. "The scene is me in a club, and the dude comes up to me and I go, 'No no no. I don't need your hands all over me. I'm good. I'm gonna dance on my own with my girls.'"
• Fired up from a meeting with Epic Records head L.A. Reid, Trainor went straight to producer Ricky Reed (Jason Derulo's "Talk Dirty," Pitbull's "Fireball"). The pair penned this song in about seven hours.
  
  Trainor recalled to Billboard magazine: "I sat down L.A. Reid and said, 'I have my album done,' and he said, 'No, you don't, you don't have a single. And I looked at him like he was crazy - I was pissed off. And I said, 'All right Mr. Reid, I'm going to write you a single right now. And I went to the studio and said, 'I need a big, angry anthem' and it turned into an awesome woman anthem about being independent."
• Ricky Reed told Pop Dust the story of the song: "It started with this dance-hall drum rhythm, and Meghan ran into the studio after an upsetting meeting with her record label," he said. "We started with a rap, and that turned into a chant. Then, we brought in some funk elements. I can't even really put into words what it turned into, but it's a pretty incredible song. It is the core of the album, but more so, it is a gateway drug. It is definitely a perfect introduction to her next musical journey."
  
  "[She was] angry, and we immediately started a concept for the song using that energy," Reed added. "She is very involved with every song and is easily one of the most talented people I've ever been in a room with. This song is very different from what's she's done before. It matches 'All About That Bass' as far as being unexpected. It's urgent and has a very strong female-forward message."
• The lyrics aren't based on any personal advances in a club. "I don't go clubbing that often," Trainor said. "No, when I'm in the club it's usually with my bro and we're in a booth. I don't have security but I think because [other guys] see my brother they don't think I'm single."
• A cappella group Pentatonix dropped a cover version on April 6, 2016. "I have chills all over my body," Trainor tweeted in response. "Coolest thing ever. Dreams come true."
• The word "no" shows up 85 times in this song.
• The song was especially successful Down Under. It topped the Australian singles chart for four consecutive weeks, and also reached #1 in New Zealand staying at the summit there for three weeks.
• The song ushered in a new sound for Trainor. "I kept writing doo-wop thinking that was right and the label turned around and said, 'You're doing what everyone expects you to do. Why don't you be the songwriter you say you are and shake it up?'" she told Notion magazine. "So I said, 'Make me a beat that Meghan Trainor wouldn't do,' and we wrote 'No' in a couple of hours. Once they heard it, the label freaked out; everyone freaked out…They wanted the song that every other artist wished they had and I was like, 'Got it!'"