look up any word, like bae:
 
1.
Male ejaculate. duh.
Eww..you got your boner batter all over my new dress!
by Figure.10 June 23, 2009
 
2.
The act of ejaculation into the vagina and continuing the act of intercourse after words.
She was so full of boner batter she practically oozed
by Boner Batter February 11, 2011