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.
When you have a shitty outlook on life
Bryan: That bitch is always complaining.
Duane: Sounds like a serious case of Opticalrectumiti..