When you take a crap in the tank of someones toilet instead of the bowl. Most often done to a sworn enemy or to your best friend.

When someone poops in the top part of a toilet, (the part that you have to take the top off) so when someone else goes to the bathroom and flushes the toilet instead of clean water coming in and filling the toilet, shit water comes in. This is done as a pratical joke, usually done at parties.

the act of deficating in the water tank of someones restroom, so when they flush, out comes muddy madness

When you go in the TOP tank of the toilet. Best used at a party or with an audience.

When you take a shit in the tank of the toilet.

A long home run ball hit into the upper seats of a baseball stadium.

take a shit in the top of someones toilet (where all the toilet guts are)