Top definition
a slight erection of the penis; it is not yet fully erect but is half way there; dick after cumming
in math class today i couldnt stop thinking of mrs. weil so i got a biller luckily is didnt become a full boner because mr plutzker called me up to write on the board.
by Billy pray August 10, 2008
Get the mug
Get a biller mug for your mother-in-law Sarah.