a person who makes plans with a person/group but flops last minute. pulls a no-show or changes the plans entirely so that it does not include the person he/she promised to chill with before.
"Yea she said we should go to the mall today but she called just now and said she had something better to do and can't make it. She's such a ditcher!"
Someone that ditches/leaves their friends.
Also, someone that backs out of plans that they arrange.
Chris: Let's go to Applebee's.
Matt: I can't. I have diarrhea.
Tanner: Okay. Sleepover at my house.
Matt: I can't. I have diarrhea.
Chris and Tanner (in unison): You're such a ditcher.
When you're talking to someone on msn and they just sign-out or ignore you for a large period of time without saying "g2g" or "brb" or something similar
I was talking to Jimmy before and I asked him something, I waited for 10 minutes to receive a response and then he just signed out. I sat there thinking "what an MSN Ditcher"