Answer: keep out of sight, typically with a sinister or cowardly motive."don't skulk outside the door like a spy!"move stealthily or furtively."he spent most of his time skulking about the corridors"Similar:lurkloiterhideconceal oneselflie in waitkeep out of sightcreepsneakslinkmove furtivelysidleslopepadprowltiptoepussyfootshirk one's duties or responsibilities."we were accused of skulking"