Someone who can't stay up past 12:30 AM because they lack the ability of being "awesome". Usually falls asleep after this
time immediately or has some type of excuse, ex. I have
work at 10 in the morning, I need
sleep.
The mcweak refers to the person taking the insult, and the weaksauce refers to being weak, insufficient, puny, pathetic, or even at times saucey.
"
Man, Taylor and Jordan should make a club called
Weaksauce Mcweaks united, they apparently can't stay up past 12:30."
"That guys such a
weaksauce mcweak, who works at 10 in the morning?"