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The riser an unwanted boner that becomes erect at a slow, even pace. Some experts maintain that the riser can be combated by thinking of fishing, baseball, your naked grandmother, etc. There has never been a documented cure for the onset of a riser.
I was waiting to check out at the grocery store, and I got a riser out of nowhere.
Riser by The Sandwich Maker September 9, 2010
A bump on skin similar to a boil
I have a riser on my arm.
Riser by usedwords February 17, 2010
the spontaniuous rising of the penis, due usually to sexual arousment
When she leaned in to kiss him, she felt his riser against her leg.
riser by paigeness May 13, 2005
There are many proper definitions for the word riser.

As a noun.
1. A person who rises, esp. from bed: to be an early riser.

2. The vertical face of a stair step.

3. Any of a group of long boards or narrow platforms that can be combined in stepwise fashion: The choir stood on a horseshoe of risers behind the orchestra.

4. A vertical pipe, duct, or conduit.

5. Metallurgy. a chamber or enlarged opening at the top of a mold for allowing air to escape or adding extra metal.

As a adjective.
1. Advancing, ascending, or mounting.

2. Growing or advancing to adult years.

As an adverb.
1. Somewhat more than.

2. In approach of; almost; well-nigh.
Example for #3 as a noun: The choir stood on a horseshoe of risers behind the orchestra.

Example for #1 as a adjective: Rising smoke.

Examples for #1 & #2 as a adverb are below.

#1: The crop came to rising 6000 bushels.

#2: A lad rising sixteen.
Riser by Maux Darkbrand June 13, 2009
All four of those women at that table are risers and they clerk at the law firm downtown.
Oprah Winfrey is probably the most famous riser in America.
Deciding to be a riser is a choice, just like a woman who decides to have kids.
riser by RR Hood July 15, 2023

riser burn 

Abrasions on the side of the neck that US Army Paratroopers may sometimes get as the result of their parachute risers coming into contact with their neck during the deployment of their parachute.

This is experienced mainly by inexperienced jumpers who don't know to keep their chin on their chest when they exit an aircraft, or by badasses who like to look up to actually watch their parachute canopy as it deploys and opens and don't mind a little riser burn in order to do that.
>> What the fuck, Airborne? Is that riser burn on your neck or some kind of fucking eczema?

>> What, this? Oh no, your mom left those bite marks all over my neck, now shut the fuck up before I fuck your sister, puke on your girlfriend, and fistfuck you in the ass around the PT track while I sing cadence, you cherry fucking homo.
riser burn by ABN_PMPN505 June 18, 2011