I think you are asking about tehnique used in this tutorial - https://www.youtube.com/watch?v=pTfjrwYcY3g (if I understood correctly "cut"). You should create any mesh, drop all vertices and use Extrude tool by clicking LMB while holding Ctrl (you may also use curves in similar way). Then you should fill the faces between created edges (or extrude faces instead).
– Mr ZakApr 20 '15 at 10:26
read this http://blender.stackexchange.com/a/1610/1853 and http://blender.stackexchange.com/questions/17952/outlining-in-blender/17954#17954
– Apr 20 '15 at 15:36
Also read parts 2 and 3 fo this answer: http://blender.stackexchange.com/a/27147/1853
– Apr 20 '15 at 15:38
Extrudetool by clicking LMB while holdingCtrl(you may also use curves in similar way). Then you should fill the faces between created edges (or extrude faces instead). – Mr Zak Apr 20 '15 at 10:26