They're called TATTOO sleeves. Look.
The Big Bang Theory Season 3, Episode 3
That's a neat TATTOO.
The Big Bang Theory Season 8, Episode 8
You're a scientist who went to college
and you don't have a neck TATTOO...
The Big Bang Theory Season 4, Episode 9
Aah! Okay, that's it. No needle.
No pain. No TATTOO.
The Big Bang Theory Season 3, Episode 3
I got a Cookie Monster TATTOO.
The Big Bang Theory Season 5, Episode 23