look up any word, like b4nny:
 
1.
Massive erection forming.
Boner Alert! I've just seen her pokey nipples.
by littlemissperky February 20, 2008
 
2.
Massive erection forming or already formed
Her pokey nipples give me such a boner alert that between them and my prince albert we could have a wicked game of hoopla.
by A Key Tapper February 22, 2008
 
3.
A prelude to an impending erection.
Homeboy #1: "Did you see that hot chick that just walked in?"
Homeboy #2: "Yea brah. Boner Alert!"
Homeboy #1: "Word."
by BooMSoN84 April 08, 2011