释义：比喻宁可付出代价而硬充作了不起，为撑面子，做一些自己力不能及的事情。

[quff oneself up to one's cost;to slap one's face until it's swollen in an effort to look imposing]∶夸大自己的能力

[do sth. beyond one's ability]：要面子,硬撑着做力不能及的事