1.
winning someone over by crying; tearful persuasion; using tears to get one's way
A persuasion tactic where someone cries or makes an emotional plea to get what they want. Often implies manipulation or insincerity.
泣き落としにあって、つい許してしまった。
Subjected to a tearful plea, I ended up forgiving them.
Usage
Generally carries a negative nuance of manipulation. The person using this tactic may or may not be genuinely upset — the emphasis is on using emotion as a tool of persuasion.