磕头碰脑[ kē tóu pèng nǎo ]

⒈ 指人多、东西多互相挤碰。例一大群人磕头碰脑地挤着看热闹。英bump against things on every side; push and bump against one another;

⒉ 比喻人与人之间闹矛盾。例街坊邻里有个磕头碰脑的事，他都出面调停。英not get along;