The full phrase is "When in Rome, do as the Roman's do." But it has become shortened so often, some people don't get it anymore. It's an analogy making use of the strict rule of the ancient Roman empire, and synonomous with "Going with the flow," or doing something because everyone else is doing it.
"Hey, thanks for coming to my party. Do you want a beer?" Said Joe.

"When in Rome," Bob exclaimed, as he poored beer into his cup.
by JJ March 16, 2004
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A phrase uttered when you do something because everybody around you is doing it. shortened version of "when in Rome, do as the Romans do"

also a new wave band from the eighties, their big hit was "the promise" which can be heard in Napoleon Dynamite
I feel like something with synthesizers, pop in that When in Rome cd
by George Washington Christ December 24, 2004
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(phrase) When in Rome, do the Romans.
Used to describe the feeling you have when you visit a new city, and can't believe your eyes as you gaze upon hoards of beautiful women and handsome men so different from your previous girlfriends/boyfriends. This attraction may occur due to stark differences in looks, ethnicity, language, culture, clothing, or blue-balls for a long long time. By law, you are required to sleep with at least one localite to make your trip a success.
Astronaut 1: Houston, we have a problem. Alien vessel approaching ship.
Houston: You know what they say, when in rome ...
by shahifaqeer July 22, 2013
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Something to say when you don't understand what someone is trying to tell you. Can also mean "When in Rome, do as the Romans do" but more often people don't know what it means and say it anyway. Similar to touche
girl: you were great last night.
guy: you know, when in rome....
by korndog April 6, 2008
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When in Rome you must live as the Romans do.

If you don't have any money then you can pay

with your body. (work hard)

if you're in an awkward situation try looking around

and copying everyone else so you don't look weird.

Do what you have to in order to make it through the day
When in Rome you must do as the Romans do.
If do don't know what to do during a big party
just do what everyone else is doing. Then you
should blend in and be ok.
by 12cesarini34 July 12, 2022
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Commonly used term, for telling someone that they should do something, or 'get on that' when they have no other explanation, and do not want to offend the poor soul. most frequently used by brunette green-eyed teenage girls.
Ex) person A:"I'm going to town for groceries, I might stop into the game on my way" Person B: "When in Rome...."
by Ballinhollabitches January 21, 2011
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Used to describe a time in conversation when one would dismiss a previous comment as if to say, "I really don't care" or "I care, but whatever".
Waitress 1- "Table 32 is really being a bunch of bitches"
Waitress 2- "Well, sometimes you just have to look at yourself in the face and say 'When in Rome'".
by Fro & Erika June 10, 2008
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