grampus
n.,
pl. 3pus[es 5earlier graundepose, altered (after GRAND) < ME grapays < OFr graspeis < L crassus piscis < crassus, fat (see CRASS) + piscis, FISH6
1 a playful, black-and-white dolphin (Grampus griseus)
2 KILLER WHALE

Apparently they had noisy breathing, because there used be a cliché of fat men
out of breath "puffing like a grampus".