A small amount of something, especially paste.

“Put a dob of butter on the potato, please.”

To report (a person) to someone in authority for a wrongdoing.

“I’ll dob on you if you break in.”

To do one's share; to contribute.

“We all dobbed in for a gift when he retired.”

To nominate a person, often in their absence, for an unpleasant task.

“I arrived just after the meeting had started and found myself dobbed in to take the minutes.”