What is "hashpipe"

Usage examples of "hashpipe".

Nor had he cared a tinker's damn about Jerry - and considering the handyman had had an insurance policy specifying double indemnity for accidental death (the building's super, with whom Sloat sometimes shared a hashpipe, had passed this little tidbit on to him), Sloat imagined that Nita Bledsoe had done nipups - but he had been nearly frantic about the loss of his key.