A fancied unit of credit and approval: I'll get Brownie points for helping him/ a place where you get big shiny brownie points, cash, sex, and adulation
[1960s+; fr merit points awarded to Brownies toward promotion to Junior Girl Scouts]
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with brownie points
Credit for a good deed, as in John earned a lot of brownie points for doing his boss's report for him. The term originated with the points earned for various achievements by the youngest group of the Girl Scouts, called Brownies. In the mid-1900s it was transferred to general use.