And I look like I might just give up, (eh!) might've mistook
“Err!” is the sound of the buzzer in TV game shows when you give out a wrong answer. You’re mistaken if you’re thinking he’s about to give up.
Also, here the beat changes like it did during the end of the first verse, so the listener might have expected the hook to come in. But Em says ‘eh you might’ve mistook’, then the verse continues.
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