To be cocky and arrogant whilst attempting to attract the opposite sex to you. Often "haddocking" will be unsuccessful and the person you were trying to chat up will depart, saying to a friend "What an arrogant t**t!" or similar.
His haddocking with that lady has flopped. She's all over that other ladnow.
The purposeful, willful and deliberate act of ungentlemanly gentleman hunting for "exotic" encounters with women of primarily Asian descent in order to achieve personal sexual gratification.