顺手牵羊 (shùn shǒu qiān yáng) | Meaning: lit. to lead away a goat while passing by (idiom) | Chinese Idiom with Pinyin & Origin

have words, material, etc. at one's fingertips and write with facility pick up something at random信手拈来xìn shǒu niān lái

to steal盗窃dào qiè

(lit.) to loot a burning house (idiom) · (fig.) to take advantage of sb's misfortune趁火打劫chèn huǒ dǎ jié

lit. to lead away a goat while passing by (idiom) · fig. to opportunistically pocket sb's possessions and walk off