What is Leach?
1.
Someone who copies a large amount of software and doesn't return the favor.
From "leach", the disgusting creature that sucks your blood.
2.
1) To walk, dragging one leg behind.
2) Used to describe someone generally very dim and/or disgusting.
1) He tends to leach quite a lot!
2) Eurgh, you're such a leach!
See
3.
superior to the term "feltch"
To suck the man juice through someone's ass while doing a handstand.
JB leaches quite frequently to overcome a hard day's work.