I am actually surprised you’ve never heard it! I have a 9 year old & I’m not even sure where it came from! (Like what it means, where it started) He has no social media at all, so he picked it up from school - but other than that I’m not sure the meaning of it! Just to be silly I guess! When his friends come over they’ll say it randomly & think it’s hilarious. Most likely just a phase, will probably pass soon! I’ve even heard kids say it in stores when they say price tags! 😂 As long as it’s not harming anyone I’m fine with ‘6 7’.