i mean, basically, its like another term for a dickwad. however, it can also mean a very attractive woman, usually standing alone in the corner, looking very hopeless, but ready for some "schving a la mode", or as some would say, sex.
its roots date back to a warm friday night in southern california. some moron wouldnt pay for fantasy football and an associate of that moron called him drunk one night and called him a dickwad schving.
Jarrod: "hey, look at that schving over there"
Stephen: "damn, thats a keeper. wheres she from, nebraska?"
Jarrod: "i dunno man, but a little schving a la mode is in the making"