Top Definition
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!

Padilla: Shut up!

Todd: Oh no no no, that mack was fairly called in accordance with the Man Laws.

Padilla: Fine...
by Padilla November 28, 2006

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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 Mack-O-Meter at full meter with arms* Uh oh, Padilla, MACKING!

Padilla: Shut up!

Todd: Oh no no no, that mack was fairly called in accordance with the Man Laws.

Padilla: Fine...
by Padilla November 28, 2006

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When something has a smaller measurement than the smallest measurement on a ruler
Mack's Penis
Man this Tic Tack is so small It looks like a mackometer
by C-Lien June 17, 2013

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A mythological instrument used to measure the amount of action (a.k.a. macktion) that once receives
"The mack-o-meter is rising tonight, girls!"
by Leah March 02, 2005

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The Urban Dictionary T-Shirt

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