Burst In is a phrase that can be used to describe an action of entering a place suddenly and forcefully. The term can be broken down into three words: POP, IMPLODE, and IRRUPT. POP is a 3 letter word that means to make a sudden, sharp sound. IMPLODE is a 7 letter word that means to collapse inward with great force. IRRUPT is a 6 letter word that means to break in or out suddenly and violently. Together, these words form the phrase Burst In, which describes a forceful entry.