to interrupt or give an opinion when not invited
招待されていないのに口を挟む、または意見を述べること (shoutai sareteinai noni kuchi o hasamu, matawa iken o nobero koto)
"I wish you wouldn’t butt in when we are discussing something serious."
"私たちが真剣に何かを話している時に、口を挟まないでほしい" (watashitachi ga shinken ni nanika o hanashiteiru toki ni, **butt in** shinaide hoshii)
to become so excited that you lose control of your feelings...
to reach a point where something becomes steady
to claim responsibility for specific work
to embrace or face emotional challenges with courage
to invest a large amount of money in something that may not...
to discuss something thoroughly to reach an agreement