killer instinct
noun1
Idiomatic The natural inclination to aggressively achieve dominance or success in a particular endeavor.
- Not for the first time this season, that lack of killer instinct - combined with an approach more responsive than probing - proved costly for Martinez's men.2011 January 25, Les Roopanarine, “Wigan 1 - 2 Aston Villa”, in BBC:
2
Used other than figuratively or idiomatically: see killer, instinct.