Bunsen Burner - Cockney Rhyming slang for Gurner (a.k.a a pill, ecstacsy pill)
"Tell you what chaps, I cannot wait to get to Ibiza and drop a bunsen"
"I'm having a big one Friday, time to order in some bunsen burners"
The burning sensation left behind after a man has sex with a fork so intensely and fast it leaves her vagina radiating heat.
Joe: So how was it?
Tim: You'd have to ask her, all I know is I left her with a Bunsen Burner. When I was through her vagina was so hot I could've warmed my hands like a campfire.