What is Sister Slammer?
1.
The act of screwing your sister.
Not a name to be proud of.
Nasty, gross and wrong.
Usually due to country lifestyle.
see
Random Guy: Dude, did you hear? Last night john screwed his sister.
Random Guy2: Ew... Bekka? He's a fuckin' sister slammer
See
Random Words:
1.
Drivers who, when there are two turn lanes for the same turning direction available, fill up only one of the two turn lanes, thereby mak..