DARPA hard
"DARPA hard" is shorthand for something considered extremely hard to achieve. The phrase comes from the US agency DARPA (Defense Advanced Research Projects Agency) who are often tasked with coming up with solutions to very difficult problems (e.g. coming up with stealth technology to prevent aircraft being shot down). The implication is that only resources of the scale available to DARPA's would be required to crack the problem.
The Urban Dictionary Mug

It holds liquid, very good
I use it to catch my cum
the mug is really durable, my parents beat me with it and it doesnt break
Love this mug, I like to use it to defecate in which I then feed to my family. 5 stars.
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