look up any word, like cunt:
 
1.
The feeling of itchyness that occurs from having facial hair grow back a little while after you shave. It usually only lasts for a short while, until the hair grows more fully or the person shaves again. When the person shaves again, however, cactus chin is sure to come back temporarily.
I am constantly scratching my beard region whenever I get cactus chin.
by Myagooshki February 20, 2011
2 0