Definitions by MR123

aftersplash prevention 

creating a structure made of toilet paper to avoid the aftersplash sensation. The toilet paper is placed under the dump approximately 1-3 seconds before landing for maximum results.

Levit, who's smarter than Diem, studies aftersplash prevention and has developed a structure which helps to avoid aftersplash time and time again.

aftersplash prevention by MR123 October 5, 2006

aftersplash 

When you take a dump and water splashes up into your asshole.

Diem took a dump and felt the aftersplash.

aftersplash by MR123 October 3, 2006