whipsaw (whip|saw)

noun

• a saw with a narrow blade and a handle at both ends, used typically by two people.

verb (past participle whipsawn or whipsawed)

• 1cut with a whipsaw: he was whipsawing lumber

• 2 informal subject to two difficult situations or opposing pressures at the same time: the army has been whipsawed by a shrinking budget and a growing pool of recruits
• compel to do something: he whipsawed the state legislature into passing his educational-reform package
• cheat or exploit.
• Stock Exchange, informal subject to a double loss, as when buying a security before the price falls and selling before the price rises: even the most skilled traders are sometimes whipsawed