I was thrilled recently received a reply to a plea on this site.  The person said that the person I was asking about was one of his 1C4Rs (!). Never heard of that so looked it up and below what I found.  So his 1C4R - is 1st cousin 4 times removed.

Common Progenitor:

The closest ancestor two people have in common is their common progenitor.
For example: you and your sister have your parents as your common progenitor.  (You also have your grandparents and great-grandparents in common, but for these purposes, we are concerned only with your closest common ancestor). 
Another example: the common progenitor of you and your first cousin is one of your grandparents.

Removed:

When we speak of a cousin being “once removed”, we are referring to the number of generations removed.
For example: Your father's first cousin is your “first cousin once removed” — You are one generation away (“removed”) from the first-cousin relationship.
Another example: Your grandfather's first cousin is your “first cousin twice removed” — You are two generations away from the first-cousin relationship.

Relationship Chart:

	0	1	2	3	4	5	6
0	CP	S	GS	GGS	2GGS	3GGS	4GGS
1	S	B	N	GN	GGN	2GGN	3GGN
2	GS	N	1C	1C1R	1C2R	1C3R	1C4R
3	GGS	GN	1C1R	2C	2C1R	2C2R	2C3R
4	2GGS	GGN	1C2R	2C1R	3C	3C1R	3C2R
5	3GGS	2GGN	1C3R	2C2R	3C1R	4C	4C1R
6	4GGS	3GGN	1C4R	2C3R	3C2R	4C1R	5C

CP = Common Progenitor S = Son or Daughter B = Brother or Sister N = Nephew or Niece

C = Cousin #R = Times Removed GS = Grandson or Granddaughter GGS = Great-grandson or Great-granddaughter

For more information, see: http://www.jewishgen.org/infofiles/related.htm