irrupt
       v 1: enter uninvited; "They intruded on our dinner party"; "She
            irrupted into our sitting room" [syn: intrude]
       2: erupt or intensify suddenly; "Unrest erupted in the
          country"; "Tempers flared at the meeting"; "The crowd
          irrupted into a burst of patriotism" [syn: erupt, flare
          up, flare, break open, burst out]
       3: increase rapidly and in an uncontrolled manner; "The
          population of India is exploding"; "The island's rodent
          population irrupted" [syn: explode]