Overused internet saying, started by the Clock Crew. It's meant to be a substitute for LOL, because Dwarfinator got banned for saying LOL on the NG boards. Taken from a costume company in the Halloween movies.
Silver Shamrock, that's awesome!
by Dodger of Zion January 13, 2004
by Trent Gibbard January 08, 2020
When you insert a four leaf clover into someone’s asshole and you fuck them with the four leaf clover still inside. It’s best to cum while still inside to give it that shamrock shake feel.
by Smokey1108 April 11, 2019
by sabianboy14 June 15, 2011
When a Irish bitch gives you a wet tit-job in a McDonald's (usually in the restroom but if your lucky, through the drive-through window)
Person 1: "Yo I got a Shamrock Shake at the local McDonald's bathroom."
Person 2 'Why in the bathroom?"
Person 1 "What."
Person 2 "What?"
Person 2 'Why in the bathroom?"
Person 1 "What."
Person 2 "What?"
by That messedup April 30, 2020
This is when a person dyes their pubes green and then has the partner cum on the pubs. After the cum settles the partner then consumes the solution.
by VapeLord421 March 19, 2018
a cum shot
by luck-o-the-irish February 27, 2009