something fierce

Adverb

colloquial not-comparable

(degree, colloquial) To an extreme extent; badly, violently.

Japanese Meaning

非常に、極度に、ものすごく / 激しく、猛烈に / 酷く、極めてひどい

She wanted that new camera something fierce.

彼女はその新しいカメラをものすごく欲しがっていた。

Sense（1）

(degree, colloquial) To an extreme extent; badly, violently.