ID:138899
 
Code:
    lip()
var/icon/I='turfs.dmi'
I.Flip(180)
src.icon=I


Problem description:
runtime error: Cannot execute null.Flip().
proc name: lip (/mob/verb/lip)
usr: Karffebon (/mob)
src: Karffebon (/mob)
call stack:
Karffebon (/mob): lip()



What the hell?

var/icon/I = icon('turfs.dmi')

The way you're using it 'turfs.dmi' is only a file, not an actual icon.
In response to ExPixel
lol, thanks