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3.
Posting an image file directly on a message board or website without linking to it, or the site that it came from. Leeching tends to be hell on the original site's bandwidth, and it is customary to swap the image for something embarrassing and/or disgusting.
Some cocksucker was leeching one of my pics, so I swapped it for Tubgirl!
by Dave October 06, 2003
 
1.
To download without giving anything in return, esp. a huge file. To suck (bandwidth) dry, as a leech would.

Also: 'leech-light' - the HD activity light when on 'full'.
I'm leeching a movie from this guy.

Getting a good rate - my leech-light is on solid!
by D December 12, 2003
 
2.
Taking snippets of code from various forums or open sources available code, and then releasing an application from himself.
Activity of a leecher
That lamer is just leeching around!
by Zheck April 17, 2007
 
4.
A girl/guy that sucks on their partners genitals similar to a Leech.
"Did you hear Lily was leeching on Corey AND Jordan?"
"I bet her mouth hurts."
by SuperSpicyBitch December 06, 2011
 
5.
Leeching (verb) comes from the subject leech. A leecher is a person who are a part of something, but dosent do shit.
He was just leeching the whole school lesson today, he didnt do sht.
by HoneyDoMePlz January 15, 2013
 
6.
To infinitely rack up points in a video game with absolutely no skill.
by Anonymous May 16, 2003
 
7.
eating a girl/pussy out while she's on her period
Toby's mouth was covered in blood after leeching Stacey.

(Stacey was on her period, therefore by Toby eating her pussy, he got blood all over his mouth)

Leeches consume blood through sucking it, such as sucking and eating out a vagina excreting blood
by Wilson Duong May 27, 2008