The ability to see inside another’s pack
Snooping is employed by thieves to gauge a mark for combat, or to select an item to steal. It should be noted that this is a skill that will lower your karma upon use.
To snoop, open another players paperdoll and double click their backpack. You can snoop into successive containers within the backpack with a separate attempt once the backpack is open. Pack animals may also be snooped by double clicking on the animal when in range.
Probably the easiest skill to train in UO, your initial character skills or NPC training are better spent elsewhere. This skill can be trained very quickly by standing in range of your target and repeatedly engaging a last object macro.
Almost always paired with Stealing, very few templates outside of thieves pick this skill.