Predderp 

When you know something is out of your league/capabilities, so you self-deselect before engaging in the activity.

"I'mma going to have to predderp on that activity, it's not my thing. I'd rather not cancel later."
"Oh man, math makes me feel like such a predderp."

Predderp by MissNeona December 10, 2022

prederp 

What happens before a derp, or what causes a derp.

Derp spelt backwards, followed by derp being spelt correctly.

An alternative form of derp with two syllables.

<&SSIDJTHED> GRAMMER FAIL
<&SSIDJTHED> fail grammer

<@poco0317> spell grammar right for once.
<&SSIDJTHED> derp
<~SSIhekill> I'm quoting that prederp.

prederp by s3xyspy July 11, 2011

Predderall 

Predderall; refers to taking the steroid Prednisone and Adderall together creating the effect for the user of rock-star caliber sexual prowess and superhero like abilities. Users commonly experience increased predictor type behaviors. Alternative experiences can be found with Addnisone.

“I’m pregaming with a couple of Predderall and gonna make it rain on a few lucky bitches tonight.”

Predderall by KellerBoy March 11, 2019

Predder 

A 'predder' is one who 'preds' something. To pred is to predict anothers predictions.

Timboy entered the game as an amateur predder soon predded Lawro's 2-0 Chelsea wins without thinking.

Predder by Phil Harris January 16, 2009