tarpit noun 2verb 1forms 3 noun2 •A lake of asphalt formed when subterranean bitumen leaks to the ground surface. Such pits are important in forming fossil fuel reserves; they are also apt to trap passing animals, which become fossilized in the tar. •A service that purposely delays incoming connections in order to reduce the effectiveness of spamming and similar techniques. verb1 •To delay by means of a tarpit service.If an attack matches a certain pattern, the connection can be tarpitted. — 2004 formstarpitted · tarpitting · tarpits