When one person is engaging in the act of fisting another persons asshole, then proceeds to extend their index finger outwards to allow deeper penetration into the receivers asshole.
There is nothing better than giving the girlfriend the old Dark Marlin unexpectedly, especially when i'm wearing my class ring
by dookla March 10, 2016

This phrase, also known as "Marlin's Didgeridoo" came from the Australian TV show Angry Boys in 2011. The direct quote was the character Gran insulting an inmate by saying "Go blow your didgeridoo Marlin". This sparked an internet meme of facebook groups or like pages about Marlin and his "didgeridoo".
The next level up from this has become Marlin's Nipples. It's used as a swear for something surprising or extraordinary.
The next level up from this has become Marlin's Nipples. It's used as a swear for something surprising or extraordinary.
Marlin's Nipples that's a long car!
You don't get it do you; Marlin's Nipples, you don't get anything!
Jake R is such a Marlin's Nipple!
You don't get it do you; Marlin's Nipples, you don't get anything!
Jake R is such a Marlin's Nipple!
by Dekkkers June 16, 2011

Is a not so common girls name but if a girl is called Marlin they are usually really friendly and smart, there is a chance that they are kind of insecure about their looks while they're actually really pretty. It's fun to hang around with a Marlin and they will do anything to chear you up if you're sad since they can show alot of empathy .
by aNoN579 February 24, 2017

When a girl's anus is too constricted for a large erect penis and either the male or female uses their index finger to prepare the ass hole for penile penetration.
by Brown Jon March 3, 2016

by Norman the 4th February 19, 2019

A Marlin boy is a fun, loving, deeply caring, person who will set whatever it is aside to help his friends. He is an amazing boyfriend who knows who to treat his girlfriend with respect and is always honest to her. they walk by her side and always help her up when shes down Many people envy a Joshua Shane Marlin and wish they where ones main squeeze or that they could be as loved and respect as one. they're also very hard working and great cattlemen. they own little Angus bulls named Big Timer and drive really fast dodge pick-ups. If you roll with a Joshua Shane Marlin, then you're rollin with the best!
by country_bumpkin21 ;) February 5, 2010

A man who is has a very small dick and often is known as the one in the group that gets beat on and forced into things he/she does not want to do and often weaps about there small issues
by Buck white December 2, 2017
