碰钉子pèngdīngziMeanings1. to meet with a rebuffCharacters used碰to touch钉nail子sonExamples1这个zhège人rén只顾zhǐgù自己zìjǐ，不顾bùgù别人biéren，你nǐ要yào他tā帮忙bāngmáng，准zhǔn得děi碰钉子pèngdīngzi。This person only thinks about themselves and doesn’t consider others. If you ask for their help, you’re bound to run into trouble.