"
My man full, he just ate, I don't duck nobody but tape
Nicki is saying is that her man is "full" that might mean two things.1. Her man doesn't need anything else but her. So her man is "full".
2. That he really did just eat her butt like a cupcake. (stated in the other line).
"I don't duct nobody but tape" means she does not associate with no one but tape. (This verse is kind of random).