General expression of irritation

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

Comes from Seinfield.
I use it as a replacement for "this is making me angry", just like goerge does in a later episode.

A seinfeld reference. Can be commonly used when you are angry, or also when someone is complaining about something trivial.

in seinfeld kramer got this line in a woody allen movie

To tire of..., To be weary of..., but yet, keep plodding on, doing what it is that causes the weariness. This catchphrase actually come from the "Sienfeld" sitcom.

However, it is easily applied to the state of mind of an Urban Dictionary Editor who has tired of, and grown weary of having to constantly push the, "Do Not Publish" button while at his/her station and thereby curtail and do away with someone's dream of being published!

From Seinfeld episode 3.11 "The Alternate Side". It was Kramer's line in a fictional Woody Allen movie and he kept saying it over and over in different ways.

It's doesn't mean anything other than what it says.