Examples from the Web for slippage
There will be, as you no doubt anticipate, some slippage in his spending.
An examination of the data shows that there has been no slippage in support for Obama from Catholics.In Polls, Obama Wins on Contraception Compromise, Catholics Hold Steady|Doug Schoen|February 19, 2012|DAILY BEAST
And it is the party of middle-class stagnation and slippage.
They had seen some slippage among seniors and independents over the summer.
Slippage is a phenomenon that I suspect many of us have experienced.
British Dictionary definitions for slippage
- an instance of not reaching a norm, target, etc
- the extent of this