A branch of aṣṭāṅga mahānimitta (the eightfold science of prognostication);
to foretell about the auspicious or inauspicious event on basis of the hole made in cloth, weapon, umbrella etc. by a weapon, a rat, a thorn etc..
vastraśastrachatropānadāsanaśayanādiṣu.....
śastrakaṇṭakamūṣikādikṛtachedadarśanāt kālatrayaviṣayalābhālābhasukhaduḥkhādisūcanaṃ chinnam.
(TaVā 3.36)
See - Nimitta.