I'm not trying to be rude or anything. I do feel there are certain cliche terms that are really widely heard in different Asian languages.

In Japanese, it has to be "desu"
In Korean, I hear a lot of "sou"
Although I know Mandarin, I dun really recall any overused terms
In Vietnamese, I hear "nham"
For Tagalog, Thai, Hmong, or any other languages, I can't catch it

No offense, these are just what catch my ears. What about you?

Hmm... I don't listen.. or hear anything other than cantonese, but even cantonese, it don't really know any words that just always seem reused. Lol, now I'm going to be thinking about it while talking to my relatives and when I'm around town.

well
desu is polite for japanese so yeh
cantonese has lots of "la"

Korean - "yo"

yeh "desu" in japanese makes it formal.. so that's y they use it at the end of the sentence usually when talking to people they are meant to respect (eldersor people they just met/not familiar with) and they usually don't use it when talking to their friends because they can be informal and relaxed. my jap teacher makes us use "desu" in our tests or we loose marks =( but yeh, apparently japanese have real good manners and thats why they don't really have swear words lyk english.. and that's why they address their elders with a "san" at the end.it's like [name]-san.
i think koreans use "sou" to emphasise.. lolz

eventhough im hmong i only know a couple of words that is over use. like for the hmong thai-ni( i heard this words being use so many times from my cuz and i dont even get what she's saying at times) hmong american-(sorry i dont remember word)

In cantonese I hear so much people saying "la" or "lor".

Another one is "sor ju" Lol can't type it but it means silly pig.
Another one I hear a lot is "gor gor" which is brother.

Can't think of any but yeah.....

I watch a lot of Korean movies and Oompa (big brother?) is over used. I think they overdo it. Maybe its just the movies I watch. But isn't there another saying they can use instead? Or their name at least? Is that too offensive?

i guess they cant really say another word

singaporean , malay got a lot of la la la...