find no bones in

bag of bones

A skinny, malnourished person or animal.

barn find

A valuable item recovered from poor storage, such as a suburban garage, farm shed, etc., where it had been more or less forgotten; especially a vintage automobile.

chew the meat and spit out the bones

To take in a great deal of information and selectively disregard some of it as invalid or inapplicable.

find another gear

To suddenly achieve an extra burst of athletic performance, especially after a sustained period of competitive exertion.

find fault

To criticize something excessively.

find it in one's heart

To be sufficiently compassionate or gracious (to do something, especially to forgive someone or be willing to help them in some way).

find one's ass with both hands and a flashlight

Synonym of know one's ass from a hole in the ground.

find one's feet

To grow in confidence in a new situation as one gains experience.