when the crack on a person's skull is resealed or reformed.
he was a crackhead so we tried putting a wet towel on his head so he would crackback (like meth).
2👍 8👎
1. a young handsome Hmong man born in the 1980's who declared his own elder name to be xaikao because of its similarities to the word psycho.
2. acting or thinking outside the norm.
3. psycho
1. My son's name shall be xaikao(psycho).
2. Damn he's xaikao.