Source : WordNet®

barge in
     v 1: enter uninvited; informal; "let's crash the party!" [syn: {crash},
           {gate-crash}]
     2: break into a conversation; "her husband always chimes in,
        even when he is not involved in the conversation" [syn: {chime
        in}, {cut in}, {put in}, {butt in}, {chisel in}, {break in}]