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"
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
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.
fails to happen
"karen's plans of becoming a grammar nazi will fall through when jon proves her wrong."
"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!
to make happen. Succeeding.
He made sure to fall through with getting a party bus.