一気いっき呵成かせい
ikkikasei

Noun
Adverb

1. finishing writing, work, etc. at a stroke (stretch); knocking something off without a break

Yojijukugo
かれ、一気いっき呵成かせいげたとってたけど、この提案ていあんしょ、少すこざつだね。
kare ikkikasēni kakiagetato ittetakedo kono tēansho sukoshi zatsudane.
He said he dashed this proposal off in one sitting. It's pretty sloppy.
Other forms: