To move about in a quiet, sneaky, inconspicuous, or furtive manner. There were some suspicious figures slinking about in the shadows, so we decided to go a different way home. The boss is always slinking about the office, making sure everyone is being productive. The dog slunk about to see if anyone would give him scraps from the table.
See also: slink
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.