Wiktionary
adv. To the maximum extent. n. An entire amount.
Usage examples of "full whack".
He got his money, after a month of gang warfare not the full whack by any means, but enough to pay his debts, buy out the brewery, gut the Shakespeare, instal the pool table, the stripper and the strobes.
The first, pemmican, full whack, with slices of horse meat flavored with onion and curry powder, and thickened with biscuit.
Despite Decimus paying full whack to Smaractus, my disreputable landlord had let a hot-wine waiter with every kind of body odour invade my office as a subtenant while I was away.
Altogether, it has been estimated, the cost to the nation of complying with the full whack of federal regulations is $668 billion a year, an average of $7,000 per household.
I was shown to a table and was so hungry that I dispensed with the menu and told the man to bring me the full whack, whatever it might consist of, then sat back happily and idly glanced at the menu, where I discovered that the full cooked breakfast was listed at £.