Stay far away from, avoid completely, as in Ronald wouldn't touch raw oysters with a ten-foot pole. This expression dates from the mid-1700s, when it began to replace the earlier not to be handled with a pair of tongs. In the 1800s barge-pole was sometimes substituted for ten-foot pole, but that variant has died out.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.