I hadn't heard the taxidermy shop one, I'll have to use it some time.
I
have used the stab 'em line, and also this one:
"City Morgue, you kill 'em we chill 'em." Usually followed up with "Slab nine speaking!"
And a personal favorite: "Ye olde grog shoppe" -- but you have to run it all together as one word: "Yeolgrogshop!"
They won't tell me exactly what I said to whom that got me banned, but I think it had something to do with telling someone that someone else must have been smoking crack when they gave the person some erroneous information.