Commander Alwyn Thomas Lavender Covey-Crump (19 February 1907 – 19 May 1991) was a British officer of the Royal Navy. An assistant to the Chief of Naval Information, he was responsible in the mid-1950s for compiling a record of Jack-speak (naval slang) and other historical marine linguistic details. The first edition appeared on 17 May 1955. The compilation, now continually updated, has led to the term Covey-Crump itself entering into Royal Navy slang.