Jerry's fat annoying neighbor on the show Seinfeld, he works as a postman and he is a good friend of Kramer, and sometimes joins Kramer in his "get rich quick" schemes.
Newman is also responsible for bringing fleas into jerry's apartment as seen on the show.
His actor is Wayne Knight.
Usually someone who acts exactly like the Seinfeld character of Newman. Sometimes it can be even used as a nickname for said person. Most of the time, if your name is Terry, you could be nicknamed Newman by your friends.