Anything that looked like a good idea at the time, but has become a quagmire from which you cannot retreat gracefully.
A relationship that is unpleasant but can't be dropped.
An unsolvable problem or bad situation you should have backed out of a long time ago.
I thought my boss would appreciate this new project, but it's Viet Nam.
"I thought you were getting along with your brother now?"
That party was Viet Nam.
The country that handed the USA's arse to them, The Americans being American, waltzed into Vietnam thinking they'd win and actually got destroyed. The vietnamese are superior at jungle warfare seeing as it's there homeland.
When you get involved with something that you have no business in
That shit was so vietnam
To have sex with someone. Can also be used in the phrases "going to vietnam" or "went to vietnam."
Dude, I totally went to vietnam with that girl last night
when a man tucks his dick and balls between his legs and stands up straight. Spin him around and you get the "reverse vietnam"
Dick showed his girlfriend the vietnam and she didnt think it was funny until she saw the reverse vietnam
A country where American soldiers killed innocent civilians and used the dead body parts as jewelry.