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
#
Dankolas O.'s definitions
sister fister
Share definition
The act of
fisting
your sister
.
Commonly
refered to as incest.
Yo
this kid
named
Nicholas
O. is a
fucking
sister fister!!
by
Dankolas O.
January 25, 2016
Flag
Get the
sister fister
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 sister fister mug.Get the sister fister mug.Get the sister fister mug.Get the sister fister mug.