You know who it is now Oh boy, oh boy I'm not your substitute number Oh no Said boy, oh boy I'm not your substitute number Oh no I know it would've been nice If I could've had your body Knowing that everybody Ain't been with you But you told me lies You made me give my heart away But now I know the games you play So I'm through with you This boy, oh boy I'm not your substitute number Oh no Said boy, oh boy I'm not your substitute number Oh no You know there's gonna be a fight If these chicks keep calling you at night I seen that text you're trying to hide But see I know the truth Must be out of your mind You thought you'd never see the day You thought I'd let her play your play But I'ma upgrade you This boy, oh boy I'm not your substitute number Oh no Said boy, oh boy I'm not your substitute number Oh no See there's not much you can say The study done changed Did I finish today? Cause I can't do it no more I won't be there when you call So you best to move on Cause I couldn't be your Your substitute number No, no, no, no, no No, no, no Listen, listen, yo, listen I said you can't call my name Like I'm going out of fashion And turn around and act like Nothing ain't happening like Nah, nothing's cracking Only when you meet a chick Only when you think about this hotness You get the itch That's when you get the itch Baby, let me be your bitch Who I hear you thinking is Bad girl, not Tetris Acting like a little boy You play me like a decoy You need to grow a couple boys You ain't got no boy This boy, oh boy I'm not your substitute number Oh, no, no, no, no This boy, oh boy If you're sick of these dudes Try G, like I told you Ladies, if you're through with us I know when you say goodnight Oh, boy, oh boy I'm not your substitute number Oh, no, no, no, no This boy, oh boy I'm not your substitute number Oh, no, no, no, no