Dictionary
Words, grammatical forms and meanings linked to the ontology.
Jimmy the One en · PROPN
Meanings
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(UK, slang) A first lieutenant in the navy.
He looks up and greets me in the bluff good-natured way that makes him popular with everyone from Jimmy the One down to our newest ordinary seaman.
2017, Martin Mace, The Royal Navy at Dunkirk:By custom of the Navy the first lieutenant, or "Jimmy the One" as he is called, is in charge of cables and cablework on the forecastle.
1943, Sir Reginald Bacon, Britain's Glorious Navy, page 28: