Podmetnuti means literally to place something underneath (
pod +
metnuti [perfective] or metati [imperfective]), for example
podmetni krpu ispod tanjira. Figuratively, it means deceive or cheat or swindle, for example
podmetnuo sam mu pljačku.
Imala je prečih poslova nego što su naša podmetanja i naše laži would be something along the lines of
She had more pressing business than our deception and lies.
Opala, looks like alexl57 beat me to the punch
