pongo
Concise Oxford English Dictionary © 2008 Oxford University Press:
pongo/ˈpɒŋɡəʊ/
▶noun (pl. pongos) Brit. military slang a soldier (used especially by members of the Royal Navy or RAF).
– origin C17 (denoting a large ape): from Congolese mpongo (see pongid). The slang sense dates from the early 20th cent.
'pongo' also found in these Oxford entries:

