A situation in which your shirt lifts or raises by catching itself on the object you lean on, displaying parts of the body that may not be necessary or even comfortable for others to see.
"Hey Jake did you see Thomas' lifted shirt syndrome in class today?"
"Yeah! It scarred me for life!"
Humorous phrase used to typically describe someone who enjoys lifting up the shirt of a shirt-wearer. Usually used to describe a homosexual man who does indeed lift up the shirt of a guy just before slipping his penis up the rectum of said guy, or just before taking another man's organ into his mouth.
E.g A man drops his pants to reveal his organ, but just before receiving a gobble from the gobbler, his shirt would require being lifted up, or even easier for the other man, taken off completely.
Dontay been spending a lot of time at those fruity male-only bars, he must be a serial shirtlifter that really loves cock!