A high maintenance girl who, though reasonably attractive, is usually meant to be a space-filler at parties and does not offer social skills or intelligence.
Biddy Girl: Where are all the hot guys at this party? Andrew only invited biddies.

Hipster Girl: I would not be caught dead at that party. It's only going to be bros and biddies.
by Cec March 31, 2008
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Girl, girlfriends, friends like bro's but with girls, girls who call their friends
by illstandbyyou June 12, 2011
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An old woman who gets in the way or is just annoying (sometimes shortened to bid)
by Ich September 30, 2003
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When a hot or attractive woman is around you or your friends and you do not want to go out and say in front of her to your buddy HEY LOOK A HOT GIRL! simply say biddy and a direction and thus everyone knows
*at an American Eagle store or some other bitch ass place*
(Hot girl walks by)
Me to Jim: biddy 3 O'Clock
by Tom Cahue March 6, 2007
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In the UK a biddy (or, more commonly, an old biddy) is a person (particularly a woman) of around 55 or above.
Some old biddy got her purse stolen.

Don't go to the Red Lion, it's full of old biddies.
by cactuscat September 15, 2006
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Describes a typical sorority girl with little apparent intelligence who says "like" and "oh my god" a lot and dresses in polo shirts, mini skirts & uggs.
Look at all that biddy in her letters. Doesn't she care about anything besides her looks and pop culture?
by MarianSch July 11, 2008
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The way people who think they're cool refer to hot women.
I did a biddy last night.
by Chizzle My Nizzle January 16, 2004
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