Wordnet 3.0
NOUN (2)
1. 
 spending money raised by borrowing; 
 used by governments to stimulate their economy; 
[syn: deficit spending, compensatory spending, pump priming]
2.  introducing water into a pump to improve the seal and start the water flowing; 
WordNet (r) 3.0 (2006):
pump priming
    n 1: spending money raised by borrowing; used by governments to
         stimulate their economy [syn: deficit spending,
         compensatory spending, pump priming]
    2: introducing water into a pump to improve the seal and start
       the water flowing