to the bone
all the way through, or very badly:
I was frozen/chilled to the bone after waiting so long for the bus.

[TahlilGaran] Advanced Learner's Dictionary ▲

to the bone
as completely as possible.
Over the past 10 years, music programs in the public schools have been cut to the bone.

When the wind whips around the house, even with the heat turned up I get chilled to the bone.

Etymology: based on the idea of cutting all the meat from a bone, which leaves nothing that can be eaten

[TahlilGaran] English Idioms Dictionary ▲

to the bone
entirely, to the core; thoroughly
He was wet to the bone after staying out in the rain for two hours.

I became wet to the bone during the heavy rain.

[TahlilGaran] English Idioms Dictionary ▲

to the bone
adv., slang, informal Thoroughly, entirely, to the core, through all layers.
I am dreadfully tired; I've worked my fingers to the bone. See: ALSO WORK ONE'S FINGERS TO THE BONE.

[TahlilGaran] English Idioms Dictionary ▲