Mark-5

Little preamble required on this one, as the majority of us Nurses had to deal with this somewhere in our careers (with an emphasis on rears)!

With a rapid ejection
From his butt,
He expelled all the contents
Of his massive gut,
Like a Mark-5 torpedo
At a high rate of speed,
Then he turned to his Nurse and said
"Isn't it time for me to feed?"