"My favorite store on the citadel" is a phrase originating from the line of dialogue "I’m Commander Shepard, and this is my favorite store on the Citadel" from Mass Effect 2. Since Shepard could\ say this for every single store, it becomes comical and virtually meaningless.
In normal conversation, the phrase can mean something is:
1. Average
2. Mediocre
3. Unremarkable
4. Pointless
In addition, it can be used as a completely neutral response when asked your opinion on something and you have none or don't care either way.
That new Adam Sandler movie was my favorite store on the citadel.
The new restaurant was whatever, it was my favorite store on the citadel.
Wife: "How do you like this dress?"
Bored Husband: "I don't know, it's my favorite store on the citadel. Can we go now? We've been shopping for hours!"
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.