Ta-moko (or sometimes just Moko) is the name for the facial tattooing practiced by the
Maoris (
aboriginal New Zealanders).
On the wane for most of the 20th century, the practice has recently enjoyed something of a revival, partly due to a tribal reawakening, and (inter-related), a movie called Once Were Warriors (1995). The designs are marked into the skin by using traditional tools (a small hammer and sharpened combs), or (today more usual) electric tattoo machine to tap in an ink or dye.
The moko can cover just the chin, or the whole face. The designs have been handed down over centuries - there are designs specific to gender, they also indicate tribal affiliations and status within the tribe.
Unfortunately, 'tribal' tattooing has been triggering 'kewl alarms' in the West, and some wannabes have ended up with (a) wildly inappropriate mokos they can't get rid of (short of laser treatment), and (b) ire from genuine Maoris who resent seeing their cultural heritage ripped off.
Just a reminder, (and I'll shout it out loud) - TATTOOS ARE PERMANENT! Yes, they're great; no, they don't wash off.