The Collaborative International Dictionary of English v.0.48:

holey \holey\ adj.
   having pores or holes.

   Syn: porous.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

holey
    adj 1: allowing passage in and out; "our unfenced and largely
           unpoliced border inevitably has been very porous" [syn:
           holey, porous]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "holey":
   apertured, crible, dowdy, down-at-heel, down-at-the-heels,
   fenestrated, frayed, frazzled, full of holes, honeycombed, in rags,
   in shreds, in tatters, like Swiss cheese, patchy, peppered,
   perforate, perforated, pierced, ragged, raggedy, ratty, riddled,
   scruffy, seedy, shabby, shoddy, shot through, slotted, tacky,
   tattered, tatty, torn, windowed