1 To be beat down physically or verbally.
2 To be beaten at a game of some kind.
3 To be mocked so badly, that you can never show your face in public ever again, leaving you with only one means of socialization: the internet.
1 Boy 1: Did you see that guy getting yelled at by that lass?
Boy 2: Yeah yeah! He was getting proper shaned!
2 Girl: HA! I WIN! SUCKS TO BE YOU! SHANED!!
3 Girl 1: Ugh! Look at tha scene twat with her extentions and converse.
Boy: But you wear extentions and converse.
Girl 2: Oh! Shaned.