Suckleunclefuckle is a whimpultarfumppletang word used to describe a male who is overly feminine in physical characteristics, appears to have more estrogen then they should and less testosterone or appears to have not or are unable to go through puberty.
Michael: have you seen Sean his 16 and hasn't gone through puberty, I don't think he cant nut
Angus: Suckle, suckleunclefuckle!!