Geoffrey Nathaniel Joseph Pyke (9 November 1893 – 22 February 1948) was an English journalist, educationalist, and later an inventor whose clever, but unorthodox, ideas could be difficult to implement. In lifestyle and appearance, he fitted the common stereotype of a scientist-engineer-inventor or in British slang, a "boffin". Pyke is particularly known for his innovative proposals for weapons of war, most especially the material pykrete and the proposed construction of the ship Habakkuk from it.