The Collaborative International Dictionary of English v.0.48:
matey \matey\ adj. having the relationship of friends or pals. [colloquial] Syn: chummy, pally, palsy-walsy. [WordNet 1.5]WordNet (r) 3.0 (2006):
matey adj 1: (used colloquially) having the relationship of friends or pals [syn: chummy, matey, pally, palsy-walsy]