Additional power which is added beyond what has already been added. Can be said multiple times for multiple effect. Closest synonym is "more oomph."
From the video game "Eternal Darkness: Sanity's Requiem," where all one has to do to juice up the power of a spell is recite the word Pargon repeatedly until the effect is larger.
"Parson Brown" is the term used to talk about a typical angelican priest of the eighteenth and nineteenth centuries. "Parson Brown" is not an actual person (though he might have been at some time), but a figure of speech, like "John Doe" is an unidentified male and "Charley" is a watchman. "Parson" by itself means minister.
The classic line from Winter Wonderland:
"In the meadow we can build a snowman
Then pretend that he is Parson Brown
He'll say 'Are you married ?', We'll say 'No man,
For you can do the job when you're in town.'"
Sure, it sounds like some kind of sexual reference, but its not. It's just a priest asking a couple if they are married. They reply that they are not and that they will wait for him to "do the job" of marrying them when he comes to their town.
The origin of this phrase (Which means excuse my use of profanity) does not originate for the French word for seal, as Lazy Time Waster suggests.
It in fact originates from the constant warfare between England and France many years ago, at that time "French" was associated with indecent things and activies (Swearing, kissing etc).
This was done fairly often in those days, sexually transmitted diseases (for one thing) had different names in different countries.
What the English might call the French disease, the Dutch might call the Spanish disease, the French might call the English disease and so on.