【顺手牵羊】〖shùn shu qin yáng〗[lead away the sheep by the way; appropriating such things as come within one's reach, as one goes about one's way; go off with sth. near at hand; lead the goat away as a handy thing to do]

顺蔓摸瓜查盗案，

手慌脚乱扒藏圈。

牵萝补屋借趁势，

羊狠狼贪污吏贪。

顺手把人家的羊牵走。比喻趁势将敌手捉住或乘机利用别人。也比喻乘机拿走别人的东西。Along hand put person goat lead  away. Metaphor take advantage favourable seize enemy or take opportunity to take advantage of others. Also metaphor like taking opportunity to take someone else's things. 同：信手拈来。反：困难至极。谜：小偷进牧场。