where did the saying two bits come from
Bit (money) "Two bits" or "two bit" continues in general use as a colloquial expression, primarily because of the song catchphrase "Shave and a Haircut, two bits." As an adjective, "two-bit" can be used to describe something cheap or unworthy.
Nibble In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation,[1][2] or half an octet. It is also known as half-byte[3] or tetrade.[4][5] In a networking or telecommunication context, the nibble is often called a semi-octet,[6] quadbit,[7] or quartet.[8][9] A nibble has sixteen (24) possible values. A nibble can be represented by a single hexadecimal digit and called a hex digit.[10]