Behold, my belly is as wine which hath no vent; it is ready to burst like new bottles.
Belly - bosom, from which the words of orientalists, in speaking, seem to come more than with us: they speak gutturally. 'Like (new) wine (in fermentation) without a vent,' to work itself off-literally, 'is not opened.' New wine is kept in new goatskin bottles. This fittingly applies to the young Elihu, as contrasted with the old friends (Matthew 9:17, "Neither do me put now wine into old bottles: else the bottles break ... but they put new wine into new bottles").