double-quick
adverb, adjective UK informal uk/ˌdʌb.əlˈkwɪk/ us/ˌdʌb.əlˈkwɪk/
十分迅速，马上，立即
very quickly
She left the room double-quick when I started singing. 我刚一开始唱歌，她马上就离开了房间。
in double-quick time UK 马上;尽快
very quickly, or as quickly as possible
I shouted and he was gone in double-quick time. 我大喊，他马上就跑没影了。
A meal was produced and eaten in double-quick time.
If I were her, I'd get myself there in double-quick time before someone else beats her to it.
That way, the food will cook in double-quick time.
A deal was done in double-quick time.
He ate and changed his clothes in double-quick time and was back out again.