from The Century Dictionary and Cyclopedia
- n. In the Levitical law, the portion (the right shoulder) of an animal presented as a thank- or peace-offering that fell to the priests: so called because offered with a gesture of heaving or elevation.
Sorry, no etymologies found.
So supper came up; and first a heave-shoulder and a wave-breast were set on the table before them, in order to show that they must begin their meal with prayer and praise to God.
Suppose he does see the whole beast before him, and the very bean-vines, proof positive of first-fruits; cannot the economical landlord gather up heave-shoulder and wave-breast and serve them out to him in next day's mince-pie?
The heave-shoulder and wave-breast typify the power and love of our great High Priest; that we should devote to Him our whole heart, with fervent prayer, and grateful praise.
The heave-shoulder, David lifted his heart up to God with; and with the wave-breast, where his heart lay, with that he used to lean upon his harp when he played.
So supper came up;  and first, a heave-shoulder, and a wave-breast
Numbers 18: 8-14) and in particular the heave-shoulder and the wave-breast.