Green’s Dictionary of Slang

1. lavatory paper.

1937–84

Partridge DSUE (1984) 415/2: C.19–20.

2. (Aus.) nonsense.

1959

Record Hackensack (NJ) 8 Sept. 45/2: [In] a special section of Australian slang I learned [...] that instead of being a ‘dabster’ (expert) I am only a ‘dag’ (humorous fellow) who is ‘giving a fly’ (making an attempt) at talking ‘fodder’ (nonsense) [...] I assure you that this is all ‘square dinkum’.