crony
Concise Oxford English Dictionary © 2008 Oxford University Press:
crony /ˈkrəʊni/
▶noun (pl. cronies) informal, often derogatory a close friend or companion.
– origin C17 (orig. Cambridge university sl.): from Gk khronios ‘long-lasting’ (here used to mean ‘contemporary’); cf. chum1.
'crony' also found in these Oxford entries:

