Wade wrote:
>rhu-barb n.
>1. Any of several plants of the genus Rheum, especially > 
>R. rhubarbarum, having long, green or reddish acidic leafstalks      
>that are edible when sweetened and cooked. Also called pie plant.
>2. The dried, bitter-tasting rhizome and roots of Rheum palmatum or    
>R. officinale of eastern Asia, used as a laxative.
>3. Informal. A quarrel, fight, or heated discussion.
I have another definition -- from my sister, who uses it all the time.  She
calls the rough grass along the edge of dirt roads "rhubarb".  
"Don't drive in the rhubarb!"
I suspect this is a Meaford thing... small town, you know.  
ERiC