BT Ned 61b(27) :ענבי נמי מיזרדן מקצצן בידא‏ : grapes are also trimmed : cut off by hand
See the entire entry for zrd vb. to choke

BT Ned 61b(27)var. [AC 7:254] :ענבי׳ נמי מיזרדן"כי מירדדן" מקצצן בידא‏ : grapes are also trimmed, (var.: when they are thinned they are) cut up by hand
See the entire entry for rdd vb. to stamp, to beat thin