I can't help but ask what you were looking up that you'd stumble upon this speech 
I was reading a thread on the straight dope message board, which posted this link.  I can't even remember which thread it was, or which forum the thread was in, since I got distracted.  Apparently, the Stomach Club met regularly to discuss topics which were not acceptable subjects of conversation in the rest of society. 
I agree that wanker is very handy.  One softball pitcher hereabouts heard the chant of wanker every time he intentionally walked the best batter on my husband's team.  I wonder if the term stuck.