Cause that ain't good enough, you expect me to fold myself in half
'til I snap,
He is using another way to describe the terminology of “bending over backwards”.
He is expected to “bend over backwards” for you, to the point where he snaps; it doesn’t matter how much he does because it’s not good enough and more is always expected from him.
Snap serves as a double entendre
snap from the bending over backwards
he snaps as in losing control and snapping on Kim or hip hop or himself (pills)
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