Blub
/blʌb/
Definition 1 of 1
Pro Tip 1/3Colloquial Usage
Use 'blub' in casual situations with friends, not in formal or professional settings. 
I couldn't help but blub during the sad movie.
Pro Tip 2/3Emotional Intensity
'Blub' implies a very strong emotional reaction, more than just tearing up. 
When he heard the news, he sat down and blubbed.
Pro Tip 3/3Not for Laughter
Remember, 'blub' is not used for laughing loudly; it's only for crying. 
She didn't laugh but started to blub in the middle of the conversation.