Fennergy 

Two twins (boys and or girls) who do everything in sync with each other and have similar personalities. They react to things similarly. They seem to have an "energy" between them.

Wow they just dodged a dodge ball at the same moment when they'er just a few feet away from each other!

You guys have this crazy fennergy between you guys!

Fennergy by SHORT BUS! April 22, 2010

Fenergy 

Your internal fuck you energy. The level of frustration where you have to yell FUCK YOU!

She was really pissing me off, my fenergy level was through the roof.

I had a sweet day today. My fenergy level is nonexistent

Fenergy by Big D Money September 20, 2007

Fenergy 

The energy required to boost in My Sims Racing, for the Wii. Discovered by Dr. F, hence the name.

I lost the race because I didn't gather enough Fenergy!

Fenergy by BoneYard1985 August 26, 2009

Fenergy 

Fake energy

Friend #1: bro, are you tired?
Friend #2: yeah bro, but i need to do well in this tournament. I need some fenergy!

Fenergy by spotdoggy May 23, 2016