2.) A continuation from the above definition, used to describe the immense attractiveness of a situation/event.
It is derived from the popular game show hosted by Paddy McGuiness, Take Me Out, in which Paddy had the catchphrase of "no likey, no lightey!"
"No lightey" can also be used to describe the opposite of the above definitions.
All variations must be said in a Lancashire accent, optimally a Bolton accent, as in the style of Paddy himself.
After getting a slap from a girl on the beach for being a perve, just turn to your friend and exclaim "no lightey!"