fall through 

Means your plans didn't work out for some reason.

(imagine someone trying to cross one of those suspended wooden bridges and falling through)

"Dude I know you're trying to hook up with that chick tomorrow night, but if that should fall through call me up and we'll play some vidja games."

fall through by evakuate March 25, 2009

fall through 

To show up; especially to a party or an event.

Guy 1: Is Lauren gonna be at the party?
Guy 2: She said she might fall through.

fall through by ItsNish May 6, 2013

fall through 

fails to happen

"karen's plans of becoming a grammar nazi will fall through when jon proves her wrong."

fall through by pocariboi January 25, 2013

fall through 

Failed to succeed

He hasn't got any money, so it looks like his plan to start a business will fall through.

fall through by toni3700 December 5, 2016

fall through 

to make happen. Succeeding.

He made sure to fall through with getting a party bus.

fall through by Galters and Jyna January 21, 2009

Fall-Through 

A drug dealer or hookup that is either bunk or doesn't deliver. a Fall-Through is the kind of guy that makes you wait 2 hours for a bag of weed, only to tell you he couldn't get it. A Fall-Through is the ultimate timewaster and ultimately, an asshole.

"Tony can't get weed, he's a fall-through"

"Bob said he has shrooms? 10 bucks says he's a fucking fall-through"

Fall-Through by Matt December 5, 2003

fall-through 

"fall-through" simply means diarrhea. The word derives from the German word "Durchfall" of which the literal translation is fall-through.

OMG, I have this terrible fall-through. I hope that's over before we board the plane. This is really embarrassing man!

fall-through by Klarissa506 January 8, 2009