Dinkum is a 6 letter English word. It's valid Scrabble word worth 13 points. It's valid Words with friends word worth 16 points.
You can make 75 anagrams from letters in Dinkum (dikmnu).
First recorded in 1890-95; of obscure origin
"dinkum yakker" all right, and about three-parts of it not necessary, if I'd only known.
No one in the Australian army but knows the meaning of "dinkum."