Methlyepsy is a condition that causes meth users to develope narcolepsy due to sleep depravation. Methylepsy can also be attributed to malnourishment and exshaustion.
A Tweekosaurus-Rex or a Tweeker would commonly have Methylepsy.
Methylepsy goes hand in hand with Mathamphetamitis, Methylabotomy, Methaphylactic Shock.
"I've stayed up way, way, way too long! Now I've got Methylepsy!"