3 definitions by Lord Plasma
"Wow, I went the whole way the other night with that girl from accounts - decided I wanted to smell the metal, and ended up with a mud rainbow"
by Lord Plasma October 10, 2011
Another term for the mud rainbow - a combination of felching and oral sex whilst your partner is menstruating.
"Jeez, that was a heavy session last night...thought I was just gonna smell the metal, but ended up with a chocolate rainbow..."
by Lord Plasma October 10, 2011
A term describing the process of giving oral sex to a woman who is menstruating. It is derived from the iron-rich odour given off from the vagina.
I wanted to go down on my girlfriend, but she was on her period, so I realised I would have to smell the metal.
by Lord Plasma October 10, 2011