The ornamental design for a noveltyattachment for pantywaistband, as shown and described.
FIG. 1 is a left elevation view of a novelty attachment for panty waist band showing my new design.
FIG. 2 is a perspective view thereof; and,
FIG. 3 is a front elevation view thereof.
The broken line showing of human form and clothing articles is included for the purpose of illustrating environment and forms no part of the claimed design.