-That feeling you get when you have had too much coffee and consequently have the sensation that you could stride at a supersonic rate for eternity.
How I encountered this word:
I coined this term myself, this very day on the way to Acme. I felt like I had within my control all the potential energy I had ever stored in my life, now bursting from my lower limbs. I thought to myself, “Wow, I really have coffee legs right now”. I thought the neolocution was quite ingenious, and decided to claim it.