1943 C.H. Ward-Jackson It’s a Piece of Cake 22: ‘I’m clueless’ I don’t know; or, ‘He’s a clueless type’ the opposite of a gen wallah.at clueless, adj.
1943 C.H. Ward-Jackson It’s Piece of Cake 52: Scrambled egg [...] an officer of the rank of Group Captain or above.at scrambled eggs, n.1
1943 C.H. Ward-Jackson It’s a Piece of Cake 31: Gen-up, to learn quickly, to swot — prior to a trade test board or some equally binding ordeal.at gen up (v.) under gen, n.2
1943 C.H. Ward-Jackson It’s a Piece of Cake 43: Has this Wimpey got the new escape gear mod?at mod, n.1
1943 C.H. Ward-Jackson It’s a Piece of Cake 54: Shot down in flames, hopelessly beaten at anything.at shoot down (v.) under shoot, v.
1943 (ref. to early 1930s) C.H. Ward-Jackson It’s a Piece of Cake 56: sprog. Any airman who is u/t—-i.e., under training. This common expression had the following origin: At a technical training school in the early 1930’s, a trade test was set in which one of the questions was, ‘State a name for a toothed wheel.’ One poor wretch answered ‘Sprog,’ confusing a sprocket and a cog. Subsequently airmen undergoing the course came to be known by that word, since when its use has spread wherever R.A.F. personnel are stationed..at sprog, n.
1945 C.H. Ward-Jackson It’s a Piece of Cake (2nd edn) 56: Snogging, courting, running around with the opposite sex. Comes from India. Thus, ‘On my leave I’m going up to the hills for a bit of snogging.’ Also used as a verb.at snog, v.
1945 C.H. Ward-Jackson It’s a Piece of Cake (2nd edn) 61: U/S. Unserviceable. It is normally applied to inanimate objects but colloquially to animate ones as well. Thus, ‘I’m in dock. I’m afraid I shall be u/s for some time.’.at u.s., adj.