In One Go
At Once, In One Breath
adverb
If you do something in one burst of energy, you are doing it in one go. Whether you're reading an entire book in a single sitting or chugging a whole beer in a single gulp, this thing you're doing is happening all at once — in one fell swoop.
一気に refers to one continuous push with no breaks. The image is momentum: doing something in a single burst, rather than something happening instantaneously.
The reading is the same as the ones you learned with the individual kanji, though いち from 一 is shortened to いっ.
一気にチェックする
to check everything at once
一気に見る
to watch something in one go
一気にいく
to go without stopping
父はテーブルの上のチョコレートを一気にたべた。
My father ate the chocolates that were on the table all in one sitting.
たくさんの人がいたので、デザートは一気になくなった。
There were so many people, so the dessert was gone at once.
人気ドラマのシーズンを丸ごと一気にみてしまった。
I binge-watched a whole season of the popular drama in one sitting.