
ill luck; misfortune
Found on 
http://phrontistery.info/w.html

• (n.) A word of uncertain signification, used only in the phrase with a wanion, apparently equivalent to with a vengeance, with a plague, or with misfortune.
Found on 
http://thinkexist.com/dictionary/meaning/wanion/
 Wan'ion  noun
Wan'ion  noun [ Probably for Middle English 
 waniand waning, present participle of 
 wanien ; hence, used of the waning of the moon, supposed to be an unlucky time. See 
 Wane .] A word of uncertain signification, used only in the phrase 
 with a wanion , apparently equivalent to 
...Found on 
http://www.encyclo.co.uk/webster/W/6
  No exact match found.