When the bill came, we all had to 'pony up'. [='pay up'] = We all had to 'pony up' for the bill.
As a knitter, I'm a 'one-trick pony': I can only knit scarves.
a musician who was a 'one-trick pony' and then faded away
(..) Got a little emergency here. Is that okay if we use your backyard? Great, great. And we take complete responsibility for whatever the pony does. Hope you get this message soon. My only concern would be the neighborhood. We really need a quiet place for our retirement. Oh, are you kidding? There's no place in Fairview that's more peaceful. Stay off the pony! Okay, guys, come on, come on! Come on! Let me show you the media room. Okay, go on in. Got the balloons? Good. (..)2006 TvShow: Desperate Housewives Title: Listen to the Rain on the Roof Season: 3 Episode 1