Lexical Definition

‎מָצַץ‎ mâtsats (maw-tsats') to drink deeply ^H:V
a primitive root

milk.

• to suck

1) (Qal) to drain out, suck

Brown-Driver-Briggs

[‎מָצַץ‎] verb drain out (compare ‎מָצָה‎; Late Hebrew id.; Arabic suck, suck up; Aramaic , ‎מְצַץ‎ suck or press out); — only Qal Imperfect 2 masculine plural ‎וְהִתְעַנַּגְתֶּם מִוִּיז כְּבוֺדָהּ תָּמֹ֫צּוּ‎ Isa 66:11 that ye may drain out and delight yourselves, etc. (|| ‎תִּינְקוּ וּשְׂבַעְתֶּם‎).

Brown-Driver-Briggs References