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10.
When you need to need to use the washroom and fear that the necessary buffer-zone may not be sufficient for the damage you are about to inflict on the toilet, requiring you turn on the sink full blast in order to dampen the sound.
Employee 1: "Dude, just rocked a monstrous sinker!"

Employee 2: "Oh snap, that poor lady with the weird eye and her office right next to the toilet! At least you have to courtesy to sinker it..."
 
1.
When one testicle hangs lower than the other. It is most easily seen when coming out of the shower. Usually accompanied by a bush.
Person 1: Look at that dudes fucked up ballsack
Person 2: No dude, it's just his sinker, it's hard to see because of the bush
by maltedmiltballs June 25, 2010
 
2.
A piece of fecal matter that is more dense than water, and thereby sinks to the bottom of the toilet. The opposite of floater.
Last time I took a crap, they were all sinkers.
by Stan B. January 16, 2003
 
3.
Term also applies to breasts with larger/longer nipples. The idea is that hanging sinker weights over long periods of time will stretch them and make them longer and possibly more sensitive.
"WTF? Sona I didn't know you had sinkers!?"
by zephanz November 21, 2013
 
4.
A non-swimmer. Usually a negro that did not grow up in a neighborhood with three car garages or was in the military and forced to learn how to swim.
Damn Bubba them sinkers sure are brave going into the water knee deep without any lifeguards around.
by BigDaveP May 22, 2012
 
5.
The bane of musicians all over the world: a music stand that sinks by itself, caused by stripped threading inside the bore of the stand.
John, get yourself another music stand. This one's a sinker. The conductor'll keep on badmouthing you 'cause you'll wind up staring down at the music and not at him!
by pentozali September 26, 2013
 
6.
Someone who plays in an online poker tournament and repeatedly folds untill he/she is in the top two.
Dude a Sinker was in this online poker tournament I was in, bummer he had only 100 chips aganist my 12,000.
by TurnOnLamp July 28, 2010
 
7.
The hangover that occurs later the next day. Usually, the effects of the alcohol don't leave until late morning, leaving the afternoon to feel sick.
I went out last night and drank so much that I woke up still a little drunk but I'll be experiencing a sinker later today.
by Ichabod25 October 26, 2009