When 2 men fuck the same girl more than once or fuck two of the same girls at least once.
Jim and Ivan both fucked Chelsea twice this past month, thus they are WEINER COUSINS
by Mercmah April 22, 2009
When two men have had sex with the same woman/women, they become weiner cousins. This is a bond that can never be broken.
We're weiner cousins now, that means we're closer than brothers.
by Bloodbath 87 April 22, 2009
a friend in which both of you had sex with the same woman
JD: since we've both slept with Kim, we're considered weiner cousins
by tex-ass April 22, 2009
When 2 guys have sex with the same chick they become weiner cousins
After Josh slept with everyone of his pledge brothers ex-girlfriends he was not only their BALT but their weiner cousin as well.
by BlondeHairBezz November 18, 2009
Two dudes who are friends and find out they have have sex with the same women. This implies their weiners have been in the same place.
Joe and Bob freaked out when they realized they had slept with each other's girlfriends. This made them weiner cousins.
by rexcars27 April 22, 2009