Tweegret 

Used on Twitter.com

-Term used for regretting a posted Tweet.

"I'm totally experiencing Tweegret after that last post."

Tweegret by GSMproductions July 22, 2009

tweegret 

the feeling that one gets that one might be missing out, by not participating in what seems to be a largely vacuous fad called Twitter.

I felt a twinge of tweegret, when I learned that Kim Jong Il now has a twitter account.

tweegret by caveatdumptruck August 21, 2010

treegret

Coming home with the tree you sawed down and realizing it looked better in the forest. Treegrets may include but are not limited to discovering unsightly holes in tree boughs, buying one of them Balsams, finding that your tree is too big for its designated location, learning your tree was once or still is a home for wildlife.

Our family had an immediate sense of treegret when we stood the Balsam up and all of its needles fell off. While scooping up the pile of needles, Maw found a bird’s nest.

treegret by iBetty December 5, 2011

twegret 

Regretting a tweet that you had posted

After tweeting that nude photo, Hayley Williams of Paramore went through a lot of twegret.

twegret by DingusAmungUs December 17, 2013