noun
great enthusiasm; high excitement
Describes a state of being very eager, motivated, or pumped up about something. Often used when someone is raring to go.
彼は新しいプロジェクトに大張り切りだ。
He is full of enthusiasm for the new project.
子供たちは遠足の前日から大張り切りだった。
The children were highly excited from the day before the school trip.
The verb form meaning 'to be enthusiastic' or 'to be eager'. 大張り切り is the intensified noun form.
Compound of 大 (おお, 'big, great') and 張り切り (はりきり, the noun form of 張り切る 'to be enthusiastic').