Tis is a short way for writing "It is"

A portmanteau of carpe diem, a Latin phrase that means “Seize the Day!” and DM, which stands for Direct Messages. This word means seizing the day via DMs.

A form of autism

Tis - it's an abbreviation / slang of "it is" or "it's" often used by British people.

The lazy way of writing "it is". Used to be seen as "snobby" but is now more common in modern culture.

Middle English/Early Modern English contraction of "it is".

the region between the genitals and the anus that used to have enough identity to be neither genitals nor anus (the 'taint) but has been sufficiently damaged to now become either genitals or anus