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An overly happy female acquaintence who loves to "pop in" unexpectedly.
Merry Poppins dropped in for some cherry poppin'.
by Max Johnson June 09, 2006
a common phrase to wish someone a joyful sex-experience
-Claire and Thomas sure had some merry poppins last night

-hey, I hope you have a merry poppins with your girlfriend tonight
by veiolet da masta February 10, 2011