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It's an abbreviation, used in London in the early 1900's, from hand-workers to the royal family

Laughed-my-posterior-off-so-vigorously-my-cylinder-fell-off-and-I-split-my-tea!
-My sire, that link you sent me was quite hilarious. I LMPOSVMCFOAISMT.
-LMPOSVMCFOAISMT? I'm not sure, I quite understending that meaning...
-Laughed-my-posterior-off-so-vigorously-my-cylinder-fell-off-and-I-split-my-tea!
-LMPOSVMCFOAISMT!
-lmposvmcfoaismt!!!!444fourtyfour
by another beeblebrox June 17, 2011
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It's an extreme version of LMFAO.
Stereotypical English person.

Stands for "laughed-my-posterior-off-so-vigorously-my-cylinder-fell-off-and-i-spilt-my-tea"
Sir, that link you sent me was quite hilarious. I LMPOSVMCFOAISMT.
LMPOSVMCFOAISMT? I'm not sure I quite understand the meaning...
I laughed-my-posterior-off-so-vigorously-my-cylinder-fell-off-and-i-spilt-my-tea!
LMPOSVMCFOAISMT
LMPOSVMCFOAISMT
by ExicutonakaDavidA March 12, 2011
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3
Laughed-my-posterior-off-so-vigorously-my-cylinder-fell-off-and-i-spilt-my-tea
Sir that link you sent me was quite hilarious. I LMPOSVMCFOAISMT
by membase goer March 08, 2011
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4
Stands for "Laughed my posterior off so vigorously my cylinder fell off and I spilt my tea"
Pater, you are so amusing I lmposvmcfoaismt.
by moass March 08, 2011
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