1- A type of small boat
2- a Scottish sland term for a loner. It can also be a verb to describe the action of making someone a loner. Dinghies are viewed as sad people with no friends, who eat their lunch aloe and talk to themselves, which makes for (funny-as) conversations.
1- He headed to sea in a dinghy
2- Dave's such a dinghy, having lunch on his own.
(verb) All his friends dinghied Dave and left him alone for lunch