乒乓波嘅滴滴仔打法英文叫乜名？

滴滴仔係俾人易D開波嘅打法，唔係正宗比賽接受嘅，英文叫
DROP SERVE。
例如：
佢打乒乓波開滴滴仔- He did a drop serve in table tennis.