A half-imaginary instrument formed by bending both arms inward at the elbow and placing the right over the left, then using the right arm as a meter needle (much like on a speedometer) to measure the level of "mackage" that one person (usually a guy) is doing towards another (usually a girl, hopefully).
Once the mack-o-meter reaches an approximately 20-25 degrees angle, the mack can be "called" as so desired; anything before it is in direct violation of Man Law.
This noun can be pronounced "Mack-O-Meter" (mak-oh-mete-er) or "mackometer" (mak-om-ett-er); usuage is contextual.
Big Country: *quickly assembled mackometer at full meter with arms* Uh oh, Padilla, MACKING!
This is another word for nosy regularly used in Trinidad and Tobago. It's the measurements as to how nosy a person can be. It originated from the word macco which describes a person who likes being nosy.
See how the neighbors peeping through their windows like their maccometer gone up.
A device women use to keep track of how many dates they have been on in a given time frame. Particularly helpful when dating online.
Scarlett inquired to Maggie, "Girl, how many dates have you been on since you signed onto Gimmesumsnatch.com?" Maggie replied, "I'm not sure, let me check my manometer and I'll see what my count is up to."