He tried to learn about the latest bands so he could impress his 'hip' new college friends.
She and her sister used to be 'joined at the hip' [='inseparable'] when they were kids.
I admit I'm 'shooting from the hip' here, but I think it's a decent idea.
(..) Catch you later, copper. - What did you say? - See you later, copper. I'm no cop, man. If you are, it's entrapment already. I'm hip. Buddy, you don't look hip. Go ahead, have yourself a good time. You're a funny guy. But looks aren't everything. Go ahead, have a good time. (..)1976 Taxi Driver
(..) My name is Henry... Krinkle. K-R-I-N-K-L-E. Hopper Avenue. - Hopper. - Yeah. Like a rabbit. Hip, hop. Fairlawn, New Jersey. - Is there a zip code with that, Henry? - Yeah. . - Okay. - That's six digits. (..)1976 Taxi Driver