The motto of this research article is to present how Bangladeshi University students use the mixture of both English and Bengali language as their spoken language. It can be said undoubtedly that English is the vast spoken language in the whole world as well as spreading to a large extent. Bangladesh is not different from other countries as well as English has been taught every level an every medium of education here and in recent times it is seen that English is used by the university students when they talk with each other I mean we can see a mixture of two languages. Each language has a social function which no other language could possibly fulfill (Hudson, 1996). Perhaps that is why code switching has become a common phenomenon in our everyday conversations in the recent years in Bangladesh. Young people randomly style switch in their daily interactions. This research paper also explores the possible propelling factors as well as stereotypical patterns behind this scenario. The data collected for the study reveals different factors as the causes behind this practice of code-switching and its impact on language behavior.