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?"