Sports. the spot on a club, racket, bat, etc., where a ball is most effectively hit.
Origin
1920-25
Examples from the web for sweet spot
Video-game designers seek a sweet spot where players feel challenge but not despair.
Wind turbines often also employ a transmission to gear the shaft speed up or down to the sweet spot.
Ring of dust lies in the sweet spot for liquid water.
Obviously, being stuck in a chronic oil-based energy crisis provides the financial sweet spot for the military-industrial complex.
Sometimes the surgeon never quite finds a patient's sweet spot.
As you can see there is a sweet spot in complexity when it comes to the rate of adaptation.
There's sort of a sweet spot as far as human settlement goes.
Extremely happy people seem to slightly overshoot the sweet spot of maximum motivation.
Optimists argue that the markets are now in a sweet spot.
It is the convenient sweet spot on the street, and can turn any stranger into a servant.
British Dictionary definitions for sweet spot
sweet spot
noun
1.
(sport) the centre area of a racquet, golf club, etc, from which the cleanest shots are made
Slang definitions & phrases for sweet spot
sweet spot
noun phrase
The best area on a tennis racket, hockey stick, golf club, or baseball bat for contact with the ball or puck: they will find the sweet spot with greater frequency with the Slotz(1974+)