Joshtimus means in slang: 1. Leader. One who walks the best when in work. The Joshtimus is known for wearing dope tie clips and watches. The Joshtimus is usually a male but a female can be one too. They always have leather in their cars. These are highly valued and sought-after. 2. A man in his 30s who loves Transformers and Optimus Prime. There are subtle traces of his Optimus love, such as the metal decals that are usually attached to tie clips and vehicles. His Facebook profile may also include images of Transformers and an Optimus Prime helmet. 3. An energetic DJ who keeps people moving. (in Slang Dictionary, added by Undeify)