How to disable middle click paste Mavericks Terminal?
You can use Karabiner (formerly known as KeyRemap4MacBook) with the following setting in private.xml:
<?xml version="1.0"?>
<root>
<appdef>
<appname>Terminal</appname>
<equal>com.apple.Terminal</equal>
</appdef>
<item>
<name>Disable middle-click</name>
<identifier>private.disablemiddleclick</identifier>
<only>Terminal</only>
<autogen>
__PointingButtonToKey__ PointingButton::MIDDLE, KeyCode::VK_NONE
</autogen>
</item>
</root>