Ejaculating an unfathomable amount of cum on a human males back, typically after engaging in homoerotic activities with a male (or trans male).
The word is stemmed from the phrase "light up my back."
"Dude, how was Thailand? Did you get any of their cheap sex massages?"
"Naw dude, I paid them extra to backlit me! It was awesome!"
by Svensk och Indisk Pojke September 26, 2019
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what scrooge says when asked by his wife for foreplay
please will you go down on me mr scrooge - "baaaclit"
by geoff November 13, 2003
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