jokes in a tv-buy a vowel
million thanks to those who help ~~:)
[Chandler: you're my girlfriend, and that's what girlfriends should, should get.
Janice: Well, ①I gotta buy a vowel. Because, oh my God! Who, would've thought that someday, Chandler Bing would buy me a drawer.
Chandler: Well, not me. But that's what's happened, and, ah, and, and there's more. We should take a trip.
Janice: We should?
Chandler: Yep, we're a couple and that's what couples do. And, I wanna meet your parents. We should take a trip with your parents!
Janice: (laughs) I don't think we need to, because you're ②tripping me out right now! Are you okay?]
Q:1. Janice is surprised that her BF got her a present, and she’s about to say her catchphrase “OMG”, but why did she have to buy a vowel before saying that?
2. chandler said they should take a trip, so Janice said he’s tripping her out now, I kinda have a feeling that it’s a play on the word trip, but is “trip someone out” a real expression that we can use in daily English?