An exclamation of terror, often said while under the influence of cannabis. The bong in question is a smoking implement, and if it has not been concealed or "put away", a parent or figure of authority may find it. This is a highly detrimental situation for the users of the bong.
J. Shit did you put the bong away?
M. Nah man, didn't you?
J. No, i thought you were going to