A lick a...

Now you've proally herd about not having a lick or a prayer, meaning you ain't got a durn chance. Well, usually a lick is synimonious with 'bit'.

Here is a sentence for ya:

Heck, that dog keeps runnin out into traffic, he ain't got a lick a sense (could be He ain't got a bit a sense)

Now don't kinfuse this with lickur, which is an adult beverage, or lick 'er which is what a cat does to itself. It licks 'erself to death.