1. [1950s+] (also copper’s helmet) the glans penis.
2. [1970s+] a haircut.
3. [1980s+] (US black teen) a condom.
4. [1980s+] from a male perspective, a woman.
5. [1990s+] (US campus) a man.
see buff the banana under banana n.
see shine one’s pole under shine v.2