give the shirt off back

give (someone) the shirt off (one's) back

To act in a very generous and selfless manner. I'm not surprised that Tammy loaned you money—she would give anyone the shirt off her back.
See also: back, give, off, shirt

give someone the shirt off one's back

Fig. to give anything that is asked for, no matter the sacrifice required. Tom would give any of his old army buddies the shirt off his back. You can always count on Mark when you're in trouble; he'd give you the shirt off his back.
See also: back, give, off, shirt