The act of 'ewaning' or a 'ewan' entering from behind, thus making his 'shaft' 'rusty' or 'browned' (covered in excrement) in the process. Girls totally digg-it! However over Shafting may lead to Red Shafting! Beware!
Girl 1 - "Ewan came round last night and totally rust shafted me!"
Girl 2 - "Wow you're so lucky, did you spurt all over his ceiling?"
Girl 1 - "Course I did!"
Ewan - "Bitches bend over and open the hatches! Im gunna rusty shaft you 'till you cough up my cock!"