diff --git a/activitypub.c b/activitypub.c
index c88b0ce..afbe7af 100644
--- a/activitypub.c
+++ b/activitypub.c
@@ -1168,6 +1168,33 @@ xs_dict *msg_admiration(snac *snac, char *object, char *type)
 }
 
 
+xs_dict *msg_repulsion(snac *user, char *id, char *type)
+/* creates an Undo + admiration message */
+{
+    xs *a_msg    = NULL;
+    xs_dict *msg = NULL;
+
+    if (valid_status(object_get(id, &a_msg))) {
+        /* create a clone of the original admiration message */
+        xs *object = msg_admiration(user, id, type);
+
+        /* delete the published date */
+        object = xs_dict_del(object, "published");
+
+        /* create an undo message for this object */
+        msg = msg_undo(user, object);
+
+        /* copy the 'to' field */
+        msg = xs_dict_set(msg, "to", xs_dict_get(object, "to"));
+
+        /* now we despise this */
+        object_unadmire(id, user->actor, *type == 'L' ? 1 : 0);
+    }
+
+    return msg;
+}
+
+
 xs_dict *msg_actor(snac *snac)
 /* create a Person message for this actor */
 {
diff --git a/main.c b/main.c
index 1026b19..cd1a47b 100644
--- a/main.c
+++ b/main.c
@@ -295,6 +295,20 @@ int main(int argc, char *argv[])
         return 0;
     }
 
+    if (strcmp(cmd, "unboost") == 0) { /** **/
+        xs *msg = msg_repulsion(&snac, url, "Announce");
+
+        if (msg != NULL) {
+            enqueue_message(&snac, msg);
+
+            if (dbglevel) {
+                xs_json_dump(msg, 4, stdout);
+            }
+        }
+
+        return 0;
+    }
+
     if (strcmp(cmd, "follow") == 0) { /** **/
         xs *msg = msg_follow(&snac, url);
 
diff --git a/snac.h b/snac.h
index 0de9d5c..cac09a9 100644
--- a/snac.h
+++ b/snac.h
@@ -264,6 +264,7 @@ char *get_atto(const xs_dict *msg);
 xs_list *get_attachments(const xs_dict *msg);
 
 xs_dict *msg_admiration(snac *snac, char *object, char *type);
+xs_dict *msg_repulsion(snac *user, char *id, char *type);
 xs_dict *msg_create(snac *snac, const xs_dict *object);
 xs_dict *msg_follow(snac *snac, const char *actor);