We have no meanings for "preposterously long" in our records yet.
1 She had taken the most preposterously long time to put Richard to bed.
2 It lasts for a preposterously long time.
3 Her eyes are fine enough, but their expression comes from their color, their size, and their preposterously long eyelashes.
4 Despite that he played some wonderful golf tee to green, though, and reeled out a series of preposterously long drives.
5 The person thus addressed was a man of about the middle age, very grotesquely attired, and with a periwig preposterously long .
6 The two rose together and sailed off into space, like an aeroplane, with a preposterously long rudder, the arrow out behind.
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