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1.
adj., showing consideration for others only when it is obviously way too late and, usually, only when forced to do so. In other words, a thoughtful gesture made as a total afterthought.
Two roommates run into each other in the hallway ...
Guy: Hey, want to grab a beer?
Guy's friend: I can't tonight. I'm going out with Samantha and Colleen ... oh ... want to come along?
Guy: Thanks! That was very *afterthoughtful* of you!

Girlfriend calls on phone, on Friday evening, after being away 2 weeks on a business trip ...
Girlfriend: Hi! I'm back from my business trip. I put together a hiking trip. Of course, you're invited!
Guy: Thanks! That was very *afterthoughtful* of you!

Guy who can no longer lie about attending an upcoming party to 1 of 5 girlfriends ...
Girlfriend: Let's do something tonight!
Guy: Uhh, so yeah ... Tonight is the big party. Want to go with me?
Girlfriend: Thanks! That was very *afterthoughtful* of you!
by Enrique Rodriguez July 11, 2008