From the french expression : "anguille sous roche" that tell : "There is a snake in the grass."
But the second metaphore that tell there is Roccolike "Rocco Sifreddi" referred to the italian pornstar.
So the meaning explain that there is something hidden about a sexual thing.
Tom : I met a really cool girl last night,, he was pretty handsome, we chat all night long !
Chloé : Shhhhhhh , don't tell me that ! I know there is a anguille sous rocco heheheh
Tom : Please no comment ahahaah you embarassed me !
angillo is cute, handsome, unbelievably charming and wholesome. He has a cutest smile anyone can see. He is someone that every girl wants to have. Popular and very social. Also a great love maker and kisser. angillo is loved by everyone he knows. Also he is very athletic and humble. He gets hurt easily because he has a tender heart
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)