Ejaculating an unfathomable amount of cum on a human males back, typically after engaging in homoeroticactivities 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 sexmassages?"
"Naw dude, I paid them extra to backlit me! It was awesome!"
You grab a full head of lettuce in one hand and bottle of salad dressing in the other. You bite the head of lettuce and take a swiq of the salad dressing out of the bottle to wash down the lettuce. Usually the only two remaining items in a bachelor's refrigerator.