Atticus said as tactfully as he could that he just didn't think he could stand a pageant tonight, he was all in. Harper Lee
Inside, the invalid had gone to bed; her mother said, "She was all in," and expressed pity for her, for the first time. Edna O'Brien
2
: fully committed to or involved in something
The Diamondbacks are all-in for this year. It's why they brought in J. D. Martinez at the trade deadline. They have a healthy mix of young and veteran players, and they're looking to make a run this October. Kevin Skiver
—often used in the phrase go all in
With my bonus in tow, I got the far-fetched idea I didn't feel like working that type of pace anymore. So I went all in on real estate on my own. Philip Michael
Note: In poker, to go all in is to bet everything on a hand.
The best my opponent could have at this point was a 5-high straight, so I went all in—my full $220,000 was riding on this hand. The last card was a Jack—and I was out. John Rochowski