Something or someone that is of
high value.
For instance if someone is worth their weight in
gold to you, then in a literal sense (assuming that person is 150 lbs.) their value would be 2,847,000 USD. (Because gold is worth about 1,300 USD per
Troy ounce)
The new financial controller I hired cut down our expenses by 26%. He is definitely worth his weight in
gold.
What?! 15 bucks for a drink? What, is
beer here worth its weight in
gold?!