Where's it to?
"Where's it to?" is Bristolian for "where is it?", using "to" to mean "at" - a feature of the local dialect. "Where's the station to?" means where is the station; "he's up to Clifton" means he is in Clifton.
In practice
The use of "to" for location is old West Country grammar and is heard across the region, but Bristolians are especially proud of it. Standard English speakers sometimes think the sentence is unfinished - "where's it to... what?" - which is the source of many jokes. The phrase appears on local merchandise and is used playfully by Bristolians who would not use it in formal speech.
Why it matters to newcomers
If someone asks "where's your office to?", they want to know where it is, not where it is going. Answering with the place is enough.
Related
- Bristolian - the dialect it belongs to
- Bristol L - another sound you will hear
- Gert lush - the compliment you will hear next
Source: Wiktionary: Bristolian.