To allow blood to flow back into the needle during drug injection (with heroin, for instance).

Back to Drug Slang Metanode

'backtracking' is equally often used in a metaphoric sense, or one not connected with the literal meaning given by Marvinius, of retracing your steps, going back to the last junction and trying a different route.

You may well have to backtrack if your changes to a computer program, for example, do not have the required result; reload your backup (you did have a backup?), and try again. Similar to Back to Square One, but perhaps requiring additional work to get back to that pristine state.

Log in or registerto write something here or to contact authors.