When one sits too far back on the toilet seat while defecating and accidentally leaves small dobs of fecal matter on the edge of the seat.
Roger called janitorial services up to the executive washroom because one of the managers failed to situate properly on the toilet and ended up Dirt Dobbing.
Eating snacks after your wife has gone to bed, but leaving the packaging out as evidence so she can find it and make you feel bad for eating nasty shit.