"Yeah.. No" is a simpler way of saying "Well yes but its not happening". (Example 1)
A Sarcastic way of answering
something where you'
re expected / supposed to answer yes however Your answer is no. (Example
2)
a way to answering someone with "No" but with the "Yes" to reassure that the first statement of ones sentence is correct/"understood" but conclusion is wrong, (Example 3)
Person1: Hey man you might wanna check the doctor x, seems kinda dangerous
person2: yeah....no.
person1: Why the
fuck are you staying up till 9am people are already awake, you should go sleep earlier
person2: Yeah no. I'm fine
Person1: Hey dude, we having a party tonight, wanna come along?
Person2: Yeah no sry i'm busy tonight, gotta
help dad with something.