The Collaborative International Dictionary of English v.0.48:
long-faced \long-faced\ adj. 1. filled with or reflecting gloom. Syn: glum, gloomy. [WordNet 1.5] 2. having a face longer than the usual. [WordNet 1.5]WordNet (r) 3.0 (2006):
long-faced adj 1: having a face longer than the usual