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1.
injecting a drug, having a hit, having a taste,having a blast
Ever since I started using smack & speed I've preferred to bang it up. It's much more fun and ya get a better effect than ya get from snorting or smoking the stuff !
by Frosty G March 13, 2008
 
2.
do it fast/ effeciently, stop waisting time
builder to a carpenter pointing to frames "bang it up"
by Scottus Maxus July 07, 2006