Source : Webster's Revised Unabridged Dictionary (1913)

Red-hot \Red"-hot`\ (-h?t`), a.
   Red with heat; heated to redness; as, red-hot iron; red-hot
   balls. Hence, figuratively, excited; violent; as, a red-hot
   radical. --Shak.

Source : WordNet®

red-hot
     adj 1: having strong sexual appeal; "juicy barmaids"; "a red-hot
            mama"; "a voluptuous woman" [syn: {juicy}, {luscious},
             {voluptuous}]
     2: newest or most recent; "news hot off the press"; "red-hot
        information" [syn: {hot}]
     3: characterized by intense emotion or interest or excitement;
        "a red-hot speech"; "sizzling political issues" [syn: {sizzling}]
     4: glowing red with heat
     5: very fast; "a blistering pace"; "got off to a hot start";
        "in hot pursuit"; "a red-hot line drive" [syn: {blistering},
         {hot}]