Definitions by Satyga

4-0 

The answer for when somebody says "thank you" by typing "10x"
4-0 means "for nothing" as in "think nothing of it", "you're welcome", "don't mention it", "no problem" etc

A: 10x for helping me the other day
B: 4-0

4-0 by Satyga October 17, 2017