(informal) Performing as well as one can.

(US) used to emphasize that one is behaving or going to behave in a trustworthy manner. / (dated) expected to do what one has promised, expected to uphold one's promise.

making somebody feel guilty.

(formal) Held on one's physical body.

Alternative form of to the bone

Alternative form of to the bone

(also figuratively) following (someone) closely

Belonging to oneself and to nobody else.

crucial moment, especially in which one can finally show his potential or must reckon with something / moment of death

to the rescue