having a killer instinct

He met with the Los Angeles Lakers - a group that included Hall of Famer Magic Johnson - and was impressed they asked about having a killer instinct.

With Luck down to only two healthy receivers and two healthy tight ends and the Colts‘ injury-riddled secondary getting thinner as the game wore on, Houston rallied to tie the score in the final three minutes before winning in overtime. Afterward, Pagano told reporters that the Colts must do a better job finishing. And when he was asked if the problem was a lack of mental toughness, Pagano responded: “It’s about having a killer instinct.”

Bryant, the superior offensive player, has succeeded by taking games over through sheer force of will, a habit which can charitably called "having a killer instinct" and less charitably called "being selfish".