We all are social animals who "RSVP" many events. But what does it stand for?? ;)

RSVP is an abbreviation for the french phrase (or fronch froz):
"respondez s'il vous plait", pronounced: "re-spawn-day-sill-voo-play".
Translated as: "you respond, if it you please" or "Answer Please".

Picture courtesy: http://bit.ly/MukNGb