postgasm

when a person on a social networking site updates numerous times in a short period.

Friend 1: Man, did you see all his posts on Facebook last night?

Friend 2: Ya, he definitely just had a postgasm..

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Postgasmic

The state a guy often goes into after shagging a girl that he has little or no connection with - lethargy, loss of interest, noncommunicative
Typically used derisively by girls when they realise that they have just been used and that the guy isn't actually interested in them.

Girl: do you know you are always so much more fun before you come

Boy: leave me alone, I feel tired

Girl: Pff, you're just postgasmic