A walkie is a wearable blanket. Other names for this object would be; robe, snuggle, slanket(for sleeved blanket), if you prefer Japanese terms, try kanguru.
The term Wankie should NEVER be used
"What did your mom just call your Snuggy?"
"She said Wankie...its for wearable blan...you know what just forget you heard that word."