1) Capital of Poland
2) Used to describe something with positive aspects, alternative to awesome or cool.

the thing that you don’t have when you’re phones percentage is over 20

said when you would like to erase from existence the last three to twenty lines of a text message conversation; especially for use in a drunken context. Origin: when typing "erase" into an iphone, warsaw is one of options given as an autotext prompt. when you have had too much to drink you tend to pick the wrong word.