According to the Oxford English Dictionary (OED), the definition of recrimination is: the action of making an accusation, esp. (and formerly always) a countercharge or counter-accusation. Now usually: the act of reprimanding or criticizing; reproach.
In other words, it pretty much means “mutual accusations.”
sample sentence: When one of the dishes at the church potluck gave the entire congregation food poisoning, all the churchgoers resorted to blaming one another with invective and recriminations.