ばかをみる
こてをかける
を取ってみても
投機をやる
ポチをやる
(傷になら) to probe a wound―(膀胱になら)―sound the bladder―(人の意見を探るのなら)―sound one's views―sound one on the subject―feel one's pulse―feel one on the subject―feel out one's views―throw out a feeler―beat about the bush―(世間の意向を探るのなら)―feel the pulse of the public―fly a kite―(政界や外交界の意向を探るのなら)―fly a ballon d'essai
to cover one [oneself] up with bedclothes
to surprise one into confession