1. (verb) enter uninvited; informal

• crash
• gate-crash

2. (verb) break into a conversation

• break in
• butt in
• chime in
• chisel in
• cut in
• put in

1. (verb) enter uninvited; informal

• intrude
• irrupt

2. (verb) break into a conversation

• break up
• cut off
• disrupt
• interrupt

1. (verb) break into a conversation

• disrupt
• interrupt

1. (verb) enter uninvited; informal

• crasher
• gatecrasher
• unwelcome guest