Usually following the word "old";
a coffin dodger, an old person who moans about their arthritis. They have little hair on their head, but compensate by tufts sprouting from their ears and noses (male) chins and top lips (female).
They dispise anything that anyone under 30 may do.
Cant manage to drive more than 30mph, and only drive on Sundays.

An old man who drives at an incredibly slow speed in the middle of the road.

a mean dirty old man.....maybe you?

An elderly person. Can also be a person of name Margret who has red hair and is quite dumb.

Someone like XirtamVotf

The origin of codger seems to lie in the complex links between cadger and codger (not as a contraction of 'coffin-dodger', as one of my more inventive correspondents has suggested). In some parts of England the two words were used interchangeably, whereas in other regions they were separate words, one meaning 'beggar' and the other 'eccentric/grotesque fellow'. The latter meaning is the one used in an early example of 'old codger', David Garrick's farce Bon Ton, 1775:

"My Lord's servants call you an old out-of-fashion'd Codger."

Men who had fallen on hard times and had resorted to any means possible to keep body and soul together were often those who were too old to find work. A cadger was likely to be a grizzled character wanting to borrow or steal from you; a codger was a peculiar and unfashionable chap, and both were likely to be old. 'Old codger' is most likely to be the linguistic merging of all those images.

A tender homosexual found in County Dublin, Ireland which originates from County Cavan, Ireland. A codger will refuse any banter or serious drinking sessions.

Slow moving old man esp. on the road.

An elderly gentleman trying to retain his youth.