Top Definition
Beating someone else at something. Used in the same context as "Trumping" someone, only used as overpowering a Trump.
Person A: "You can't Trump Trump!"
Person B: "I just O'Donnelled your Trump!"
by Jordanface! December 09, 2007
ALT 1: To have sex that you can pretend isn't sex, typically because it doesn't involve vaginal penetration. Requires delusional level of religious belief involving purity vows, etc.

ALT 2: To masturbate

Sexual euphemism reflecting media clusterfuck around Christine O'Donnell, bizarre non-sex lobbyist who is/was the teabagger 2010 Republican US Senate candidate in Delaware.
Dan Savage, Savage Love | Letter of the Day | 9/20/10:
Considering 1. his presence every time you're messing around with her (surely the library, the living room, or your room would've occurred to him if he were uncomfortable being in the same room while you fingered / O'DONNELLED his girlfriend) and 2. the limitations she's placed on the sex she's willing to have with you, and 3. his tendency to suddenly "show interest" after you've been messing around with his girlfriend (at which point you "move over" and, presumably, out), I'm thinking your girlfriend's primary partner has a bit of cuckolding lite/sperm competition syndrome thing going.
by Delaware Dave September 21, 2010
An extremely undesirable and unsexy thought that suddenly enters an individual's mind during masturbation, killing the mood and filling the individual with shame and horror.
I was having a great wank when I had an odonnell about Nancy Reagan wearing a bikini.
by meiyoumayo October 21, 2010
The standard unit of volume of a fart. 1 Rosie O'Donnell is equivalent to 20 oz. of farts.
person 1: "Man I blew the biggest fart last night!"
person 2: "Really? how big was it?"
person 1: "I dont konw, but it mus have been at least 2 Rosie O'Donnells."
person 2: "Holy shit, 2 O'Donnells?!"
by iddup May 08, 2011
An unwelcome and decidedly unsexy thought that pops into an individual's mind while they are masturbating.
I was trying to rub one out when suddenly I had an o'donnell about a Christine O'Donnell political ad.
by flickinthebean October 21, 2010
n. \ō-ˈdä-nəl\
An unwelcome and decidedly unsexy thought that pops into an individual's mind while they are masturbating.
Jenny IM'd me about her yeast infection while I was watching porn. Talk about an odonnell!
by Jezebel B. "itch" Commenter October 21, 2010
A device for storing burgers in.
"I don't want the rest of this burger, i'll just shove it in the O'Donnell"
by Dwyer, The May 12, 2003
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