In text messaging, the number "4" consists of the letters: G, H, and I. With these letters, you are able to spell the word "high". Four to the fourth is an exponential term: 4 x 4 x 4 x 4. With T9 word, pressing the number "4" four times will spell out the word "high". Getting four to the fourth means to get high.
by Mr. Hero October 19, 2008