Know what it means to “spin a dit?” Or to be in “a drop of roughers?” This comprehensive guide to the humorous and colorful slang of the British Royal Navy explains it all in layman's terms. Compiled by a decorated ex-Royal Marine surgeon, it contains often-hilarious examples of common usage, useful cross-references, and comic illustrations by Tugg, the popular cartoonist from the service newspaper Navy News. Jackspeak is essential for anyone with an interest in the Royal Navy—or who just enjoys fun wordplay!