1) used as a greeting call amongst friends. 2) An erection or boner exhibiting roundness. 3) male genitalia. 4) A screw up or mistake. 5) used as a battlecry, exclamation or excitement.
1) Hey, Bowner!
2) Gotta Bowner!
3) Ouch, that hit my Bowner!
4) What a Bowner!
5) BOWNER!
A "bowner killer" is when you hear something awful or disgusting. Such as when a girl talks about her period, or if you see this incredibly ugly girl. It is also directly known as something that makes you have the opossite of a bowner..
It is also known as BK.