Brown-Driver-Briggs
III. [
בַּד]
noun masculine only
Plural בַּדִּים.
a. empty, idle talk (Phoenician CIS3, 6 listen not to בדנם = Hebrew בַּדֵּיהֶם; compare 
vain talk), especially with collateral idea of imaginary pretensions or claims: Job 11:3 בַּדֶּיךָ מְתִיםיַחֲרִישׁוּ thy idle talk brings men to silence ("" וַתִּלְעַג), Isaiah 16:6 (of Moab) לֹא כֵן בַּדָּיו his boastings are not right (unfounded), hence Jeremiah 48:30.
b. concrete empty talkers, praters (compare Late Hebrew בַּדָּאָה, Syriac 
, liar), of false prophets, Isaiah 44:25; Jeremiah 50:36.
