my only regret is not thinking of this first

code/__DEFINES/misc.dm

@@ -285,6 +285,7 @@ var/list/bloody_footprints_cache = list()
 #define TURF_WET_LUBE	2
 #define TURF_WET_ICE	3
 #define TURF_WET_PERMAFROST 4
+#define TURF_WET_SLIDE	5
 
 //Maximum amount of time, (in approx. seconds.) a tile can be wet for.
 #define MAXIMUM_WET_TIME 300

code/game/turfs/open.dm

@@ -95,7 +95,7 @@
 					C.spin(1,1)
 		return 1
 
-/turf/open/proc/MakeSlippery(wet_setting = TURF_WET_WATER, min_wet_time = 0, wet_time_to_add = 0) // 1 = Water, 2 = Lube, 3 = Ice
+/turf/open/proc/MakeSlippery(wet_setting = TURF_WET_WATER, min_wet_time = 0, wet_time_to_add = 0) // 1 = Water, 2 = Lube, 3 = Ice, 4 = Permafrost, 5 = Slide
 	wet_time = max(wet_time+wet_time_to_add, min_wet_time)
 	if(wet >= wet_setting)
 		return

code/game/turfs/simulated/floor.dm

@@ -30,6 +30,7 @@ var/list/icons_to_ignore_at_floor_init = list("damaged1","damaged2","damaged3","
 	intact = 1
 	var/broken = 0
 	var/burnt = 0
+	var/pryable = 1 //can we pry up tiles?
 	var/floor_tile = null //tile that this floor drops
 	var/obj/item/stack/tile/builtin_tile = null //needed for performance reasons when the singularity rips off floor tiles
 	var/list/broken_states = list("damaged1", "damaged2", "damaged3", "damaged4", "damaged5")
@@ -141,6 +142,8 @@ var/list/icons_to_ignore_at_floor_init = list("damaged1","damaged2","damaged3","
 		return 1
 	if(..())
 		return 1
+	if(pryable == 0)
+		return 1
 	if(intact && istype(C, /obj/item/weapon/crowbar))
 		if(broken || burnt)
 			broken = 0

code/game/turfs/turf.dm

@@ -104,12 +104,14 @@
 				if(!M.slip(0, 3, null, NO_SLIP_WHEN_WALKING))
 					M.inertia_dir = 0
 			if(TURF_WET_LUBE)
-				if(M.slip(0, 4, null, (SLIDE|GALOSHES_DONT_HELP))) 
+				if(M.slip(0, 4, null, (SLIDE|GALOSHES_DONT_HELP)))
 					M.confused = max(M.confused, 8)
 			if(TURF_WET_ICE)
 				M.slip(0, 6, null, (SLIDE|GALOSHES_DONT_HELP))
 			if(TURF_WET_ICE || TURF_WET_PERMAFROST)
 				M.slip(0, 4, null, (SLIDE|NO_SLIP_WHEN_WALKING))
+			if(TURF_WET_SLIDE)
+				M.slip(0, 4, null, (SLIDE|GALOSHES_DONT_HELP))
 
 /turf/proc/is_plasteel_floor()
 	return 0

tgstation.dme

@@ -43,8 +43,8 @@
 #include "code\__DEFINES\reagents.dm"
 #include "code\__DEFINES\role_preferences.dm"
 #include "code\__DEFINES\say.dm"
-#include "code\__DEFINES\sight.dm"
 #include "code\__DEFINES\shuttles.dm"
+#include "code\__DEFINES\sight.dm"
 #include "code\__DEFINES\stat.dm"
 #include "code\__DEFINES\tablecrafting.dm"
 #include "code\__DEFINES\tgui.dm"