A male with an uncanny knack for attracting attractive, desirable women.
opp: vermin magnet
With his fan club of catwalk models, Peter is a real fanny magnet.

by Big Simes January 22, 2003
A sports car that attracts young ladies.
That car of yours is a real fanny magnet!
by Tom_NZ March 27, 2007
An older homosexual who is attractive to young gays. From the American slang word for ass - the 'fanny'.
Gerry had silver hair and a tight pair of speedos. He was a real Fanny Magnet
by Columbo gets It Wrong March 3, 2009