slush fund

用以行贿官员等的钱

sludge, slue, slug, sluggard, sluggish, sluggishly, sluggishness, sluice, slum, slumber, slumberer, slumberous, slummy, slump, slung, slunk, slur, slurp, slurry, slush, slushy, slut, sluttish, sly, slyly, slyness, smack, smacker, smacking, small, small arms, small change, small talk, small-minded, small-mindedness, small-scale, small-sized, small-time, smallholder, `smallholding, smallish,