When you rapidly blink your eye next to someone's cheek (or any place else) which makes your eyelash brush up and down against their skin.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

Fluttering one's eyelashes on someone's skin so they just feel the tickling sensation.

a caress made by winking an eye so the lashes brush one's partner

Plural of Butterfly Kiss.
A Butterfly Kiss is administered thusly:
1. Get your eyelashes up against some else's bare skin, so close that when you blink, your eyelashes caress the other person's skin.
2. Open and close your eyes rapidly. Each time your eyelashes brush the other person's skin, it is one Butterfly Kiss.

when someone is so close to you you can feel their eyelashes batting on your cheek, usually in a romantic way

A butterfly-kiss is the rapid fluttering of one's eyelashes anywhere that tickles on another person's skin.