A penis which can be used to accurately measure temperature.
"Is it cold today?"

"Let me go outside and check my penistat."
by ttoptommy July 3, 2012
Get the Penistat mug.
It's a tattoo on your penis.
Yo Jeff check out my penistat! It's a cross because i luv jezuz!
by Lolpokemanz543 March 15, 2010
Get the Penistat mug.