Top Definition
A thick solution of accumulated bacterial biofilm covering the teeth of those who fail to brush regularly. Normally denotes an ejectus: a portion of the substance expelled after tooth- and tongue-scaping. The portion size is directly correlated to the length of time since the last thorough brushing, flossing and/or professional cleaning.
I just sneeze-sprayed that guy's BLT with a dollop of mouth mayo.
I don't keep my favourite condiments in my fridge: mouth mayo is a sauce best served warm.
by DrtVcrDaz February 23, 2012

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