speed money
n.— «They feel that such reporting is futile since police would not make the GD entry of a case without bribe or would investigate such a case only on payment of ‘speed money’ which is another name for bribes.» —“Police reforms are indispensable” by Enayet Rasul Financial Express (Dhaka, Bangladesh) Oct. 26, 2005. (source: Double-Tongued Dictionary)