gut choke

A word (n.) defining the moment when one is too overtaken by emotion to continue as planned. Usually involving the attempted expression of love or sadness. Always involving tearing up and a choking feeling.

The guy was hit by a gut choke as he tried to sing a song he had written to his girlfriend, as she was readying to leave for a trip. Fortunately, he had written the lyrics down on an envelope, she read them, and the day was saved.