WordNet (r) 3.0 (2006):

barge in
    v 1: enter uninvited; informal; "let's crash the party!" [syn:
         barge in, 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,
       barge in, break in]

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "barge in":
   admit, be admitted, break in, break in upon, breeze in, burst in,
   bust in, butt in, charge in, come barging in, come between,
   come breezing in, come busting in, come in, crash, crash in,
   crash the gates, creep in, cross the threshold, crowd in, cut in,
   drop in, edge in, elbow in, encroach, enter, entrench, foist in,
   gain admittance, get in, go in, go into, have an entree,
   have an in, hop in, horn in, impinge, impose, impose on,
   impose upon, infiltrate, infringe, insert, insinuate, interfere,
   interlope, interpose, intervene, intrude, invade, irrupt, jam in,
   jump in, look in, obtrude, pack in, pop in, press in, push in,
   put in, put on, put upon, rush in, set foot in, slink in, slip in,
   smash in, sneak in, squeeze in, steal in, step in, storm in,
   take in, throng in, thrust in, trench, trespass, visit, wedge in,
   work in, worm in