diff --git a/moto/core/responses.py b/moto/core/responses.py
index 73f2b37c2..54b575912 100644
--- a/moto/core/responses.py
+++ b/moto/core/responses.py
@@ -343,8 +343,6 @@ class BaseResponse(_TemplateEnvironmentMixin, ActionAuthenticatorMixin):
         if hasattr(self.body, "read"):
             self.body = self.body.read()
 
-        raw_body = self.body
-
         # https://github.com/getmoto/moto/issues/6692
         # Content coming from SDK's can be GZipped for performance reasons
         if (
@@ -379,7 +377,7 @@ class BaseResponse(_TemplateEnvironmentMixin, ActionAuthenticatorMixin):
                         OrderedDict(
                             (key, [value])
                             for key, value in parse_qsl(
-                                raw_body, keep_blank_values=True
+                                self.body, keep_blank_values=True
                             )
                         )
                     )
diff --git a/tests/test_cloudwatch/test_cloudwatch_boto3.py b/tests/test_cloudwatch/test_cloudwatch_boto3.py
index a5d881ac5..7de4cb844 100644
--- a/tests/test_cloudwatch/test_cloudwatch_boto3.py
+++ b/tests/test_cloudwatch/test_cloudwatch_boto3.py
@@ -2,6 +2,7 @@ import copy
 from datetime import datetime, timedelta, timezone
 from decimal import Decimal
 from operator import itemgetter
+from unittest import SkipTest
 from uuid import uuid4
 
 import boto3
@@ -10,7 +11,7 @@ from botocore.exceptions import ClientError
 from dateutil.tz import tzutc
 from freezegun import freeze_time
 
-from moto import mock_aws
+from moto import mock_aws, settings
 from moto.core import DEFAULT_ACCOUNT_ID as ACCOUNT_ID
 from moto.core.utils import utcnow
 
@@ -27,6 +28,43 @@ def test_put_metric_data_no_dimensions():
     assert {"Namespace": "tester", "MetricName": "metric", "Dimensions": []} in metrics
 
 
+@mock_aws
+def test_put_a_ton_of_metric_data():
+    """
+    A sufficiently large call with metric data triggers request compression
+    Moto should decompress the request if this is the case, and the request should succeed
+    """
+    if not settings.TEST_DECORATOR_MODE:
+        raise SkipTest("Can't test large requests in ServerMode")
+    cloudwatch = boto3.client("cloudwatch", "us-east-1")
+
+    metrics = []
+    metric_dimensions = [{"Name": "Environment", "Value": "env1"}]
+    metric_args = {"Unit": "Seconds", "MetricName": "TestCWMetrics"}
+
+    for type, licences in {
+        k: v
+        for k, v in {
+            "userTypes": [{"id": f"UserType{x}"} for x in range(0, 50)]
+        }.items()
+        if k in ["userTypes", "appBundles", "apps", "extensions", "portalCapabilities"]
+    }.items():
+        for licence in licences:
+            metrics.append(
+                {
+                    **metric_args,
+                    "Dimensions": [
+                        *metric_dimensions,
+                        {"Name": "Type", "Value": f"{type}/{licence['id']}"},
+                    ],
+                    "Value": 1,
+                }
+            )
+
+    cloudwatch.put_metric_data(Namespace="acme", MetricData=metrics)
+    # We don't really need any assertions - we just need to know that the call succeeds
+
+
 @mock_aws
 def test_put_metric_data_can_not_have_nan():
     client = boto3.client("cloudwatch", region_name="us-west-2")