A rating scale between 1 and 10 when deciding whether a woman is fuckable. 10 being gorgeous and instantly fuckable and 1 being an ugly pig dog you wouldn't wish on your worst mate.
I would rate her 2 on my tapometer, she is kinda smelly, with pendulous breasts and huge pointy dagger nipples, but enough beer and I would tap her.
A mental gauge that every man has that is used to measure the presence breasts in any situation. It may also be used to measure the quality of breasts.
1.
"Dude this party is bitchin'"
-What is your titometer reading at?
"After the busty volleyball team got here, I think it may have broken. So I'd say the titometer is reading just past titillating."
-I am on my way!
2.
I liked that girl, but she barely affected the titometer.
A tachymeter (also tachymetre or tacheometer) is a kind of theodolite used for rapid measurements and determines, electronically or electro-optically, the distance to target, and is highly automated in its operations. Tachymeters are often used in surveying.