To hang around in a boat park with your mates pretending to fix your boat. Essential props for bimbling include a pop-rivet gun, some gaffa tape and a few tins of beer. Example: Person 1: Have you seen Olly? Person 2: He's down the boat-park having a bimble with Robert and the other guys.
BIMBLE
Meaning of BIMBLE in English
Slang English vocab. Английский сленговый словарь. 2012