"Naknak" is a word in CEBUANO

naknak v {1} [AC; c1] knock s.t.
lightly against s.t.
else.
Kinsay nakanaknak niíning básu nga nabalanáan man?
Who knocked this glass against s.t.
to make it crack?
{2} [B] for fish to be plentiful and spread over a wide area (so called because the fish are attracted by a banging soundCf.
dagukduk).
Nagnaknak ang mga tugnus karun maung daghang nanlampara, Theres mil- lions of anchovy fry around, so everybody is out catching them.
a for a school of fish to be so plentiful they are easy to catch.