t is a secretive way of saying masturbating aka. fapping, beating the meat, fapulishus.
It is comonly used by a group of men when a rare female is present, to not scare the rear specimen away.
Even though it might be little weird or suspicious it is clearly more safe and unnoticeable way of allerting your fellow dudes to not disturb or help you cover up.
When you use it in a sentence you will most likely bend it, in the usage they only bend the "measuring"; i measured, we are measuring, they measured, i am going to measure.
"Ey bro i gotta go and measure my big toe, be right back."
"Keep Stacy entertained i have to measuring my big toe."
"Ey Jackson i just spotted Ben and Charles, looks like they are measuring their big toes"
The random string of cuss words you say when you smash your toe on an unsuspecting object, like a table corner.
*Person 1 is using phone while it is being charged*
*Person 2 trips on the charger wire, enabling the phone to fly out of Person 1's hands, and to land on Person 1's toe*
Person 1: "SHIT ASS ON THE TOE! SHIT. ASS. ON THE TOE!"