1. A computer program product for dictionary-based social media stream filtering, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform a method comprising: receiving, by a processor-based dictionary manager, at least one dictionary configuration, each specifying at least one dictionary from a set of dictionaries and respective settings for the at least one dictionary; and filtering, by a filter, a social media stream using the at least one dictionary configuration to provide at least one filtered social media stream, wherein the respective settings for the at least one dictionary comprise a respective dictionary influence polarity and a respective polarity magnitude for the respective dictionary influence polarity.