Mudcat Café message #3325351 The Mudcat Café TM
Thread #104496   Message #3325351
Posted By: MartinRyan
19-Mar-12 - 04:51 PM
Thread Name: Lyr Add: Nobby Hall (Cyril Tawney)
Subject: RE: Lyr Add: Nobby Hall (Cyril Tawney)
Jackspeak , a guide to British naval slang and usage glosses OD as follows:

Abbreviation of Ordinary Deckhand, a non-existent rate considered to be one lower than the basic rate on entry for Jack, which is Ordinary Seaman, in turn one lower than the Able rate or AB.

Basically a term of mild abuse or pity!