gravy

noun

1.
a sauce made by adding stock, flour, or other ingredients to the juice and fat that drips from cooking meats
2.
the seasoned but not thickened juices that drip from cooking meats; often a little water is added
pan gravy
3.
a sudden happening that brings good fortune (as a sudden opportunity to make money)
bonanza boom bunce godsend gold rush manna from heaven windfall