I wouldn't touch with a barge pole

I wouldn't touch somebody/something with a barge pole.

  (British & Australian informal) also I wouldn't touch somebody/something with a ten-foot pole (American & Australian informal)
something that you say which means that you think someone or something is so bad that you do not want to be involved with them in any way If I were you, I wouldn't touch that property with a barge pole.
See also: barge, pole, touch