take a plunge
verb
Roget 799a: speculate, invest, trade, trade stocks, play the market; buy long, sell short, take a position, straddle; take a plunge, plunge in, take a flier [Coll.].
Roget 310: plunge, dip, souse, duck; dive, plump; take a plunge, take a header; make a plunge; bathe etc. (water) 337. submerge, ... show more
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