a bit of a/an

:  the biting or cutting edge or part of a tool

:  a replaceable part of a compound tool that actually performs the function (such as drilling or boring) for which the whole tool is designed

:  the jaws (see ¹jaw 2a) of tongs or pincers

:  to put part of a bridle in the mouth of (a horse) :  to put a bit (see ¹bit 2a) in the mouth of (a horse)

:  to control as if with a bit

:  to form a bit (see ¹bit 4) on (a key)

:  a small quantity of food

:  a small delicacy

:  a small piece or quantity of some material thing

:  a unit of computer information equivalent to the result of a choice between two alternatives (such as yes or no, on or off)

:  the physical representation of a bit by an electrical pulse, a magnetized spot, or a hole whose presence or absence indicates data