Enables triglyceride lipase activity. Involved in positive regulation of triglyceride catabolic process; regulation of inflammatory response; and unsaturated fatty acid metabolic process. Acts upstream of or within neuroblast proliferation and neurotransmitter biosynthetic process. Predicted to be located in nucleoplasm and plasma membrane. Predicted to be active in postsynaptic membrane. Is expressed in brain; liver; and spinal cord. Orthologous to human DAGLB (diacylglycerol lipase beta). [provided by Alliance of Genome Resources, Apr 2022]