also: きょくぶり · ごくふり · ごくぶり
noun
min-maxing; concentrating points on a specific ability
Video game term for allocating all or most of a character's stat points, skill points, or resources into a single attribute or ability to maximize its effectiveness, often at the expense of balance.
このゲームでは、攻撃力に極振りするとボス戦が楽になる。
In this game, if you min-max your attack power, boss fights become easier.
防御に極振りしたキャラは、なかなか倒されない。
A character with all points poured into defense is hard to take down.
Compound of 極 (きょく, 'extreme') and 振り (ふり, 'allocation' or 'distribution', from 振る 'to assign'). The term originated in video game communities to describe the strategy of concentrating all available points into a single stat.