Threadshitting is threadjacking with intentionally vile content which includes extremely NSFW images such as tubgirl, goatse, genital mutilation, murder and anything else that a mature, sane person would find offensive and/or disgusting.

Mercury retrograde is the act of taking a shit whilst mooning one or more human beings. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy and fruitful times to come.

Threadshitting is belittling the topic or the people discussing it on a message board. It typically takes the form of a dismissive comment, like “Who cares?” or “This is stupid!” or similar. The implication of the threadshitter is that discussion of such a topic is beneath them, and should be beneath everybody else.