"Bimbling" is the aviation equivalent of going for a Sunday drive; to go for a flight with no particular purpose other than enjoy the very act of committing aviation.
I don't think the OP suggested he was in IMC (just crappy vis) but is an example of a salutory lesson we all need to learn tha,. however well you think you know the area, there could always be something that could catch you out.
Cheers
Whirls