Banter contains many meme and mimic variation phenomena. Genotype and phenotype variations are two basic forms. By means of analyzing the manner of variations in banter examples, the paper draws conclusion that using mimic variations properly can bring harmony between communication system and pragmatic parameters, and this shows the major strategies in communication, including conversion, borrowing, creation, content reduction, topic-avoiding and utterance -avoiding, which all conform to the pursuing new psychology of the communicative subjects, hence they act as the lubricating oil in communication.