What is Brain-lag?
1.
The sleep-deprived, often disorienting way a person feels after working on so many impending deadlines their life has become a blur, usually made possible by the regular consumption of several litres of caffeinated beverage in short amounts of time.
Huh? Oh, I get it now. Sorry: brain-lag!
Employer: "Have you been here all night? You look like shit!"
Employee: "Yeah, a bad case of brain-lag..."
{employer leaves cubicle}
Employee: "...bastard."
See 
Random Words:
1. 
complete nonsense;  tomfoolery in the bitchiest and sluttiest sense.  basically hoskankery SQUARED.
"I couldn't pay attention..