ukr.vitalinguist — How to say it in authentic Ukrainian

butt in
C2 verb — butt in

to interrupt or join in a conversation or activity when the other people do not want you to

Authentic Ukrainian renderings

Confidence: high = attested in ≥3 sources OR ≥2 source classes; medium = 2 sources of same class; tentative = single source.

сунутисяtentativeverb, perfective1 source, 1 hite2u:Новий українсько-англійський словник

Bilingual dictionary attestations (1 dicts, 1 rows)

Новий українсько-англійський словник
сунутися to intrude, to interfere; sl. to butt in.

Live source: https://e2u.org.ua/s?w=butt%20in&highlight=on