A sign of ultra-jealousy from the scale of Jealousy, Jellyfish and Meduse. Meduse abbreviates to Making Everyone Delusional Using Self Esteem. People can have MeduseSwag which means you naturally make people ultra-jealous.
When an attractive person makes direct eye contact with you and just freeze there staring and smiling; making eye contact with an attractive person and you just freeze in place blushing/smiling.
Dude, I saw this girl at the coffee shop earlier and she totes had the Medusa Effect.
This girl got me weak yo! She definitely had the Medusa Effect down!
You: Come on, tell us your plans for the party.
Me: Not now. I will tell you when that bloody bugger is not listening otherwise he will certainly meddle in and mess up everything.