To delay/wait texting back someone who has sent you a text in order not to appear overly excited about the fact that they texted you. This is especially true when it is someone you are interested in.
I'm so excited....John just texted me! I am going to textcrastinate as long as possible before I reply.
Rather than doing anything useful in the world, you spend hours on end reading comments, following RTs, and picking up new followers by pursuing other twitterer's followers on Twitter.
Yeah I'm facing a hugewriting deadline, but I'm caught up twitcrastinating instead.
How tech geeks procrastinate: randomly updating their twitter account over and over and over and over…usually with boring updates.
Combo of procrastinate and tweet.
Tech geek online: Today, I got bored and decided to tweetcrastinate. Ha. Ha. Ha.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.