A trade in 'yes-yes' words; meanwhile, some load up their bullocks.

This insightful couplet talks about how some people make a business out of empty words and excessive politeness, constantly saying 'yes, yes' or 'Ji-Ji.' It's a trade of words that can be insincere. The second line suggests that while some engage in this verbal maneuvering, others end up carrying the heavy loads, like pack animals. It highlights a common human dynamic where smooth talkers might exploit or burden those who are more unassuming or agreeable. It's a reminder to be aware of the real intentions behind words and to recognize when you might be carrying someone else's burden.