Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and seventeen great-great-great-grandparents in common.
Irregular-nonuple-fourth-cousin.
by Cerejini May 21, 2024
Get the irregular-nonuple-fourth-cousinmug. Mike: I had sex with Alyssa last night.
Jon: Oh, shit! I used to hit that also! We're belly cousins!
Both: *high five
Jon: Oh, shit! I used to hit that also! We're belly cousins!
Both: *high five
by Flyboy87124 October 29, 2020
Get the Belly Cousinmug. When you have a cousin related on both sides of your family.
When a set of siblings marry another set of siblings - both marriages have children and they are cousins squared.
Aka cousin to the power of 2.
When a set of siblings marry another set of siblings - both marriages have children and they are cousins squared.
Aka cousin to the power of 2.
by Cousin^2 November 16, 2019
Get the Cousin Squaredmug. Tenth-cousin-twice-removed (10C2R).
My tenth-cousin-2X-removed is a good person.
by N8953SW June 26, 2021
Get the tenth-cousin-2X-removedmug. 
Get the half-first cousinmug. My sesqui-first cousin is a good person.
by Mr. Jacov November 23, 2019
Get the sesqui-first cousinmug. Ninth-cousin-seven-times-removed (9C7R).
My ninth-cousin-7X-removed is a good person.
by N8953SW June 26, 2021
Get the ninth-cousin-7X-removedmug.