barge in(в разговор); shove oar in(Anglophile); jump into(Even the adherents of the Communist Party, who tend to feel entitled to all of Russia's former Soviet domains, said with a broad majority – 62% – that Russia should not jump into Ukraine's internal crisis. | TIME.com 4uzhoj); strike(в ссору, драку); mess with(driven); butt in
bud in(to interfere, interject, or meddle, in another's affair with the direct intention to take sides in a dispute or argument. • I could see that they had your back up against the wall; so I had no choice but to bud in, on your side of the situation, to make it a fair fight.urbandictionary.comandreon)
butt in(в разговор, в чужие дела и т.п.); horn in(Nobody asked you to horn in on our conversation. – Никто не просил тебя встревать в разговор. VLZ_58); butt in(в разговор, в чужие дела); mess over(someone)