A lady acquaintance called 'Mangrove' because she had an indiscriminate rooting system!
A RAAF chopper driver called 'Hubcap' because he thought he was a big wheel but he was really only a . . . . . .
A bloke I met in a pub in Cirencester called 'Harpic' because he was clean round the bend!
Regards,
BH.