не иметь ни малейшего представления(Sorry to say I haven't the foggiest idea how to get it open. • I haven't the foggiest idea how they intend to make money. • I didn't have the foggiest idea what I was going to do. • Nobody had the foggiest idea what was happening.В.И.Макаров)
переваривать идею(Употребляется с cannot, напр.: I cannot stomach the idea of meeting my old girlfriend (to dislike or hate someone or something). inyazserg)