Let´s have a look at some idioms relating to body parts:
* get cold feet = to suddenly become too frightened to do something you had planned to do, especially something important like getting married.
* to pull someone’s leg = Fig. to kid, fool, or trick someone; to tell someone something that is not true as a way of joking with them (usually in continuous tenses)
* to have green fingers (British & Australian) also have a green thumb (American) = to be good at keeping plants healthy and making them grow
* to be up to your neck (in something) – deeply involved; “neck-deep in work”; “up to their necks in debt”
* see eye to eye (about someone or something) (with someone) and see eye to eye (on someone or something) (with someone) = Fig. [for someone] to agree about someone or something with someone else