It's challenging to determine the exact meaning behind your boss's behavior without more context, as people's actions can have various interpretations depending on the situation and the individual involved. However, I can provide some possible explanations for your boss's behavior:
Communication Style: Some people have unique communication styles, and tapping your shoulder and quickly walking away might be your boss's way of trying to get your attention without interrupting you or engaging in a lengthy conversation.
Busy or Distracted: Your boss could be busy or preoccupied with other tasks, and the quick tap on your shoulder may indicate that they need your attention or assistance but are unable to stop and talk at that moment.
Social Interaction Difficulty: For some individuals, initiating face-to-face conversations can be uncomfortable or challenging. Tapping your shoulder and walking away might be a way for your boss to avoid direct confrontation or social interaction.
Signal to Approach: It's possible that your boss wants you to come to them, and the shoulder tap is a non-verbal cue to get your attention so that you approach them later when they are available.
Playfulness or Habit: In some cases, it could be a playful or habitual behavior on your boss's part, not necessarily intended to convey a specific message.
To gain a better understanding, you could consider observing your boss's behavior more closely and pay attention to the context in which the shoulder tap occurs. If it's causing any concerns or confusion, you may want to address it directly with your boss. A polite and open conversation can help clarify their intentions and ensure effective communication between you both. However, remember to choose an appropriate time to discuss the matter when your boss is available and not busy with important tasks.