Simple past tense and past participle of whipsaw. (verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "whipsawed" in a sentence
"Summer arrived, and dogs and men, packs on their backs, rafted across blue mountain lakes, and descended or ascended unknown rivers in slender boats whipsawed from the standing forest."
"Elvis Picardo, investment strategist at Northern Securities, said the Canadian market continues to be "whipsawed" by the volatility in the U.S."
"When an investor puts his neck on the line by risking everything on a cycle, there's always a chance the cycle (assuming it really exists) will be "whipsawed", which can always happen in the short-term by shifts in investor sentiment and trading volume patterns."