sabat amen

Etymology
From +, from people reminding someone to make the sign of the cross before joining in the prayer.

Noun

 * 1) someone who barges or joins in other people's conversation uninvited
 * 2) an instance of intruding or injecting yourself in other people's conversation
 * 3) someone who injects themselves in issues they are not directly involved

Verb

 * 1) to intrude or inject in a conversation