First cousin's great-granddaughter.
My great-great-cousin-niece is a good girl.
When you and another guy get cheated on by the same girl but both of you already fucked her and you both have her AIDS.
Guy One:Dude,I can't believe she used us like that,and now I have AIDS from her.
Guy Two:Bro I got AIDS from her too!
Guy One:Holy moly that makes us flu cousins.
Guy Two:Man let's go somewhere to eat,my treat.
When you and someone else have both gotten to second base with the same person.
Not to be confused with Eskimo Brother or Eskimo Sisters, in which the two people have had sex with the same person. Or with Minnesotian Twins, in which two people have simply kissed the same person.
Steve: Dude I was making out with Nikki yesterday and she let me put my hand under her shirt.
Evan: No way! I got to second base with her last week.
Steve: Canadian Cousins!
*high five*
Someone who, in relation to others, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and twenty-one great-great-great-grandparents in common.
Irregular-undecuple-fourth-cousin.
6.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and thirteen great-great-great-grandparents in common.
My 6.5-tuple-fourth-cousin is a good person.
A cousin that one has sexual intercourse with.
"I heard you've been seeing your cousin."
"Yeah, we're incest cousins."
15.5-tuple-4C: Person who, in relation to the other person, has zero parents, zero grandparents, zero great-grandparents, zero great-great-grandparents and thirty-one great-great-great-grandparents in common.
My 15.5-tuple-fourth-cousin is a good person.