A late night meal. Generally used to skip breakfast in the morning. Used particularly by college students, but it's never been known to discriminate. Usually between the hours of 1 A.M. to 3 A.M.
2 guys hanging out late at night:
"Hey dude you wanna get some Sobfast?" - person 1
"Ya dude im down. Lets order some McDonalds." - person 2