The Collaborative International Dictionary of English v.0.48:
Pug nose \Pug" nose`\ A short, thick nose; a snubnose. -- Pug"-nosed`, a. [1913 Webster] Pug-nose eel (Zool.), a deep-water marine eel (Simenchelys parasiticus) which sometimes burrows into the flesh of the halibut. [1913 Webster]WordNet (r) 3.0 (2006):
pug nose n 1: a short nose; flattened and turned up at the end