The contents of a bong, once filtered and dried to be re-smoked once one has ran out of weed / synthetic weed. Can also refer to the contents of a bong thoroughly cleaned with uncooked rice and ethanol or methylated spirits - dried and ready for re-consumption.
Couldn't get any decent weed so had to re-smoke my scunge. Wasn't bad though.
The act of obtaining something from another person by asking. This act would only be undertaken by a low-brow individual, or by someone who is monetarily challenged.
See also: scab
"Could I scunge a ciggy off ya?"
"You reckon I could scunge a couple of bucks for a Farmers Union; I left my wallet in the back of my girlfriend's Commy again."