diff --git a/docs/keycodes.md b/docs/keycodes.md
index bfebe8d..618037e 100644
--- a/docs/keycodes.md
+++ b/docs/keycodes.md
@@ -233,6 +233,7 @@
 |Key                    |Description                                                          |
 |-----------------------|---------------------------------------------------------------------|
 |`KC.RESET`             |Put the keyboard into DFU mode for flashing                          |
+|`KC.DEBUG`             |Toggle `debug_enabled`, which enables log spew to serial console     |
 |`KC.GESC`              |Escape when tapped, <code>&#96;</code> when pressed with Shift or GUI|
 |`KC.LEAD`              |The [Leader key]                                                     |
 |`KC.UC_MODE_NOOP`      |Sets UnicodeMode to NOOP                                             |
@@ -289,4 +290,4 @@
 |`RCAG_T(kc)`|                                       |Right Control, Alt and GUI when held, `kc` when tapped |
 |`ALL_T(kc)` |                                       |Left Control, Shift, Alt and GUI when held, `kc` when tapped - more info [here](http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/)|
 |`SGUI_T(kc)`|`SCMD_T(kc)`, `SWIN_T(kc)`             |Left Shift and GUI when held, `kc` when tapped         |
-|`LCA_T(kc)` |                                       |Left Control and Alt when held, `kc` when tapped       |
\ No newline at end of file
+|`LCA_T(kc)` |                                       |Left Control and Alt when held, `kc` when tapped       |
diff --git a/kmk/internal_state.py b/kmk/internal_state.py
index 054bd9c..677583a 100644
--- a/kmk/internal_state.py
+++ b/kmk/internal_state.py
@@ -45,6 +45,7 @@ class InternalState:
             RawKeycodes.KC_MACRO: self._kc_macro,
             Keycodes.KMK.KC_LEAD.code: self._kc_lead,
             Keycodes.KMK.KC_NO.code: self._kc_no,
+            Keycodes.KMK.KC_DEBUG.code: self._kc_debug_mode,
         }
 
     def __repr__(self):
@@ -291,6 +292,17 @@ class InternalState:
     def _kc_no(self, changed_key, is_pressed):
         return self
 
+    def _kc_debug_mode(self, changed_key, is_pressed):
+        if is_pressed:
+            if self.config.debug_enabled:
+                print('Disabling debug mode, bye!')
+            else:
+                print('Enabling debug mode. Welcome to the jungle.')
+
+            self.config.debug_enabled = not self.config.debug_enabled
+
+        return self
+
     def _begin_leader_mode(self):
         if self.leader_mode % 2 == 0:
             self.keys_pressed.discard(Keycodes.KMK.KC_LEAD)
diff --git a/kmk/keycodes.py b/kmk/keycodes.py
index a18c029..b0dea09 100644
--- a/kmk/keycodes.py
+++ b/kmk/keycodes.py
@@ -530,6 +530,7 @@ class KMK(KeycodeCategory):
     KC_LOCK = Keycode(1006)
     KC_NO = Keycode(1107)
     KC_TRANSPARENT = KC_TRNS = Keycode(1108)
+    KC_DEBUG = KC_DBG = Keycode(1112)
 
     @staticmethod
     def KC_UC_MODE(mode):
diff --git a/user_keymaps/klardotsh/klarank_featherm4.py b/user_keymaps/klardotsh/klarank_featherm4.py
index ecf90bd..bb465e2 100644
--- a/user_keymaps/klardotsh/klarank_featherm4.py
+++ b/user_keymaps/klardotsh/klarank_featherm4.py
@@ -81,7 +81,7 @@ keyboard.keymap = [
         [KC.GRV,  KC.EXLM, KC.AT,   KC.HASH, KC.DLR,  KC.PERC, KC.CIRC, KC.AMPR, KC.ASTR, KC.LPRN, KC.RPRN, KC.SLSH],
         [KC.TAB,  xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, KC.MINS],
         [KC.LGUI, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx, xxxxxxx],
-        [KC.LCTL, xxxxxxx, xxxxxxx, xxxxxxx, _______, _______, xxxxxxx, xxxxxxx, KC.MUTE, KC.VOLD, KC.VOLU, xxxxxxx],
+        [KC.LCTL, KC.DBG,  xxxxxxx, xxxxxxx, _______, _______, xxxxxxx, xxxxxxx, KC.MUTE, KC.VOLD, KC.VOLU, xxxxxxx],
     ],
 ]