1) Be a garbage collector 2) Be vulturous 3) Behave like jackals 4) Clean 5) Clean refuse from 6) Dine like a hyena 7) Feed on carrion or refuse 8) Fish through rubbish 9) Forage for scraps 10) Gather discards 11) Gather from discards 12) Hunt 13) Hunt among refuse 14) Hunt for food 15) Live like a jackal 
To look for meat for food that was killed by a different animal.
This ability is written Scavenge (cost). Any time he or she could cast a sorcery, a player may exile a card with scavenge from his or her graveyard to put a number of +1/+1 counters onto target creature equal to the power of the creature with scavenge. Scavenge appears on green and black cards of the Golgari guild in Return to Ravnica.
• (v. t.) To remove (burned gases) from the cylinder after a working stroke. • (v. i.) To remove the burned gases from the cylinder after a working stroke; as, this engine does not scavenge well. • (v. t.) To cleanse, as streets, from filth.
Scav'enge intransitive verb (Internal- combustion Engines) To remove the burned gases from the cylinder after a working stroke; as, this engine does not scavenge well. Scav'enge transitive verb To cleanse, as streets, from filth. C. Kingsley. 
[v] - clean refuse from 2. [v] - feed on carrion or refuse 3. [v] - remove unwanted substances from, as in chemistry
eat food that is already dead or garbage