A response trivialising someone's description of what they plan to do, when the listener finds it extravagant or believes it won't actually be carried out or won't succeed.
Person A: My sister is so upset with her local councilman that she's starting a petition to have him recalled.
Person B: Yeah, she's gonna shit and fall backwards in it.
By Ibbie
Fall Ass Backwards
To be given a job, responsiblity, etc. Abruptly and with little notice. Generally last minute and annoying.
Mom: I'm leaving watch the baby! Bye!!!
Kid: WHAT?!? No I can't even clean this thing if it shits the bed!!!
Mom: I tough you a while ago.
Kid: that was my sister!
Mom:*speeds off in car*
