One of the ways is to trap them in a box and put a fireplace and some flamable stuff in there like a chair or plants then light the fire.
actually you can't kill them with the cheat but there other ways how to kill a Sim
There are none!
in the cheat box
flower
rosebuds
irobbedsantaclause ihatethisgame
tdh
One code is drivedive445
none
CONFUSED!!
there aren't any
Bottle on the beach
in the appartment in the computer