plus-up
n.β Β«Convinced that the companyβs engine technologies were important, with the help of Virginia Sens. Warner and Allen they were able to add whatβs called a “plus-up” to the 2006 defense appropriations bill. (Thatβs money for a program not part of the Presidentβs request.)Β» ββMilitary turns to Synchrony to develop aircraft engine” by Andrew Kantor Roanoke Times (Virginia) June 17, 2006. (source: Double-Tongued Dictionary)