whip
a fair crack of the whip: seecrack.
whip the cat
1 complain or moan.
2 be sorry; show remorse. Australian & New Zealand informal
the whip hand a position of power or control over someone.
2012New York Times Aung San Suu Kyi took the opportunity to strike a conciliatory tone toward the military rulers who kept her under house arrest for 15 years and still hold the whip hand in deciding the fate of Myanmar's fragile reforms.
whips of large quantities of. Australian & New Zealand