(idiomatic) and some quantity, but less than the increment to the next round number.
It cost me two dollars and change. (i.e., more than $2 but less than $3)
How fast was he going? A hundred and change. (i.e., more than 100 but less than 110).
Used other than figuratively or idiomatically: see and, change.
Source: en.wiktionary.org