To hover an inch or so above the toilet when taking a crap. Either because the toilet is disgusting. Or poor weather conditions.
Being -10 degrees outside, I didnt want my ass to freeze so I took a hovercrap. Someone shit all over the seat, so i had to take a hovercrap
1)The act of hovering over the toilet seat during defecation. Usually the result of encountering an offensive public toilet
2)The resultant pile of feces left on the back of the toilet seat during this act.
That shitter was so foul I did a hovercrap.