The result of the first time you shampoo on your own after you get a new haircut, and you not only lose the style, but your head looks abnormally large and rectangular for the rest of the day. Example: When I left the salon yesterday, my doo was stylin...but today I got the teshmelon.
TESHMELON
Meaning of TESHMELON in English
Slang English vocab. Английский сленговый словарь. 2012