What is Spunk Brother / Sister?
1.
A half sibling via your father
ie from his 'spunk donation'
usually applying to promiscuous men with more than one family.
I didn't know you had a brother/sister - Oh he's my "Spunk Brother / Sister"
Underlining the fact that the relationship is not a close one.
Random Words:
1.
when you throwup in and around a girls muff and lick it out
dude1: dude i had myself a yackmuffin the other nite
dude2: sheckler is ga..