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1.
Acronym: Very Short Reply Expected, for use in an email that doesn't require more than a two- or three-word reply.

Originates from a vrypan blogpost.
Dear John,
When will you be available this week?
VSRE,
Steven

Tuesday.
-John
by omega5419 April 21, 2013
 
2.
very short reply expected, ie you can answer this with "yes", "no", "sounds good" etc.
We on for tonight?

VSRE

"Yes"
by gryftir April 21, 2013