shoot one's wad
shoot one's wad {v. phr.}
{slang}, {colloquial}
1. To spend all of one's money.
We've shot our wad for the summer and can't buy any new garden furniture.
2. To say everything that is on one's mind.
Joe feels a lot better now that he's shot his wad at the meeting.
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Source: A Dictionary of American Idioms
