仗义勇为: help a lame dog over a stile; come to sb.'s defence out of a sense of justice; take a firm stand to see that justice is done; take bold action to uphold justice; take up arms for justice
疏不仗义: be indifferent to [careless of] wealth but concerned about [careful of] virtue; distribute wealth and act righteously; give generously
行侠仗义: have a strong sense of justice and ready to help the weak