parliamentary ping-pong
n.— «After a lengthy session of parliamentary ping-pong, in which important concessions were wrung out of the government, we allowed this imperfect bill to pass on the clear and unequivocal agreement that it would be reviewed, and repealed if necessary, within a year.» —“Escaping reality” by Nick Clegg Comment is free (United Kingdom) Oct. 17, 2006. (source: Double-Tongued Dictionary)