Sorry fellas...
Your reference to the origin of the word wanker, is incorrect. As a High School boy in Australia in 1975 the word was alive and doing fine as a regular part of school-boy parlance.
A bloke who constantly lies and believes he can get away with it. The trouble is he can't remember which lie he told you 5 minutes ago. And sits looking over your shoulder pointing out typing errors while you're writing this about him. And he's too stupid to know you're actually writing about him. The wanker.