smeg

[crystal]

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smeg

Definitions
Wiktionary
interj. (noun) Substituted for almost any swear word (popularised in UK by the TV series Red Dwarf).

'Smeg' may come from 'smegma,' a whitish sebaceous secretion that collects between the glans penis and foreskin or in the vulva. 'Smegma' comes from the Greek 'smekhein,' to wash off.

Examples
“The show's star, Craig Charles who plays 'smeg-head' David Lister, admits Dwarfies are obsessives. But he defends their behaviour.” Live After Red Dwarf, BBC News
“Holograms may have been given a bad rep by the smeghead Arnold Judas Rimmer in Red Dwarf, but Quantum Leap redressed the balance thanks to the legendary Albert 'Al' Calavicci.” Cult Spy Icons #6: Al Calavicci, Digital Spy
http://www.wordnik.com/word-of-the-day

[spiros]

Also: http://en.wiktionary.org/wiki/schmuck