Pillock

Origin

The origin of pillock is believed to go back to the 16th century meaning penis

http://www.allwords.com/word-pillock.html

from the Norwegian word pillicock, presumably akin to the slang dickhead meaning inept fool

http://www.answers.com/topic/dickhead

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Full definition of pillock

Noun

1. (British, mildly pejorative, slang) a stupid or annoying person; simpleton; fool.

Synonyms

• (British, mildly pejorative, slang, stupid or annoying person) wazzock, plonker

Anagrams

• lip lock, lip-lock, liplock