Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending
to get a lump in one's throat; to overflow with feelings; to be overwhelmed with emotion
see 胸一杯
電話で良の声を聞いたら胸がいっぱいになった。I got all choked up when I heard the voice of Ryo over the telephone.
Also written 胸が一杯になる【むねがいっぱいになる】