Skip to main content
Home
Add a Definition
UrbanDictionary.store
Blog
World
Advertise
User Settings
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
#
lexkatt's definitions
Sistercest
Share definition
having a
realtionship
or
sexual
relationship
with your sister's ex
I can't
believe
my sister is
fucking
my ex. She's
committing
sistercest.
by
lexkatt
December 2, 2010
Flag
Get the
Sistercest
mug.
More random definitions
Share this definition
Copy Link
Facebook
X
Pinterest
WhatsApp
Reddit
Email
Sign in to vote
We'll email you a link to sign in instantly.
Send me a link
Sending...
Or
Continue with Google
Check your email
We sent a link to
Open your email
Get the Sistercest mug.Get the Sistercest mug.Get the Sistercest mug.Get the Sistercest mug.