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a player who usually bounces from one girl to another.
"damn i was with Cosimo last weekend and now he's with another girl!"
An amazing person, he always knows how to answer questions and is loyal to all his friends. He is the best at sports in all his classes and takes everything competively and likes to tease others when they lose. In the end you can just say he is a G.O.A.T aka Greatest Of All Time
"Yesterday I was destroyed by Cosimo, He is just too good."
Cosimo by ESKETEEEE December 7, 2020
A cosimo is a person who has fingers longer then 10 cm long, and is therefore amazing at bridge. If you see a cosimo walking down the street, you should run away, buy a house in Ipswich, change your name to Nathaniel and stay in that house for the rest of your life because cosimo is probably coming after you. In 2011 a Cosimo was at the top of the CIAs kill list for the touching of several million goats, and he will not hesitate to touch you either. And always remember: he's behind you!
Mark: I saw a Cosimo today.

Ben: you do not know me
(Ben proceeds to cut all connection between himself and Mark in case Cosimo comes after him)
cosimo by the harlertron 3000 January 16, 2015
a young italian boy who is the son of justin norris and brother to biggy norris. married to james charles and hannah Montana singer
cosimo met biggy in austrailia
cosimo by unknowncool December 7, 2020
A good looking boy that is from Italy. Most likely from Sicily, he knows people in the Italian mafia and many girls are attracted to him but are shy to say. He will most likely become successful at an older age. Is considered very funny. Cosimo usually has very nice eyes aswell.
Sarah “I saw Cosimo today”
Madeline “Your so lucky
Cosimo by Tony Vincenzo December 9, 2022
Thing to shut when you put a finger in the ass of a friend, in honour of Cosimo, italian king who really loves a finger in the ass.
You can also be "Cosimato"
COSIMOOO! *Put finger in the ass as you go up the stairs*
Cosimo by Lucertola February 21, 2025