1. [1970s+] (UK prison) prison tea [its taste, supposedly reminiscent of diesel fuel].
2. [1980s+] (US) one who has a muscular, well-developed physique.
3. see diesel-dyke n.
[2000s] (S.Afr. gay) a male homosexual who dresses like a stereotypical lesbian.
SE in slang uses
[2000s] (US prison) the constant movement of an inmate between prisons.
see under suck v.1