An emergency exclamation used to alert
friends in the immediate area of the necessity to leave RIGHT NOW with no questions asked, usually because you have just comitted a crime or done something illegal or that you will be in very big trouble for.
Like "
bounce", only much MUCH more urgent.
"
Dude, why did you call 1, 2, 3,
bounce? I was getting ready to buy a manga."
"Because I puked all over some books in the C++ section."
You should never yell 1, 2, 3,
bounce unless you really mean it.