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a parent that just took part in conception of a child and yet has no contact, part in taking care of or providing for the child what so ever. AKA; deadbeat, low life, scum, pos, loser, worthless, whore, sad, etc.
**My sons donor is a male whore who is also pos.

**Anyone can be a donor it takes someone special to be a daddy!
donor by froggy17 December 3, 2010
A member of a fantasy sports keeper league who never wins money at the end of the season due to his sub-par management ability.
You never win anything in this league. You're a freakin donor!
Donor by Woody Williams May 2, 2011
A person who recklessly rides a powerful motorbike, usually a 1000cc Japanese sportbike with illegal pipes. The characteristic behavior includes wheelies, speeding, burnouts etc illegal activity. The moniker "donor" refers to the fact that the rider is eventually very likely going to donate his (still intact) internal organs after a fatal accident.
Did you see that donor? He almost hit my car!
Donor by MotoKiller April 9, 2019
A donor is a person who likes to drink and smoke pot, or someone who is high and drunk, it is a combination of drunken stoner.
Look at that donor drink vodka when he gets cotton mouth.
Donor by TAB12 December 24, 2009

donor machine 

We've got a victim coming in to Ambulance bay 2 that was riding a donor machine.
donor machine by Orius September 4, 2002

donor boner 

when ur buddy has a chance with a super hot chick BUT she has a fat or ugly friend that will most definately cock block so u have to take one for the team {also known as wingman}.
Jason:yo I got a chance with that hot chick over there but I know her fat friend is gonna cock block me, so I need ur help.
Ed:let me guess u need my donor boner for the fatty.