A slang term commonly used to describe moderate to severe flocculation of drilling fluid due to various contaminants; also called "gelled-up". (Bul 10C, Bul D11)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}