Ok, we've had our funny and witty comments but it's time to be serious really.
I'm really surprised that no-one has said what I consider to be the most important thing; The thread's title is
What is: Flying VFR into IMC?
IMHO, the short answer is; Unless you are sufficiently trained in Instrument Flight...
It's bloody dangerous!!
Some posters have related their experiences and have stated that they were lucky. They are the ones who survived their experiences!
leadsled put it quite succinctly I believe.
If you are not IFR trained and current, stay in severe VMC.
Nuff said!