someone you know, but do not necessarily like, but cannot seem to get rid of. a "friend" in your group that no one claims to introducing to everyone, an ex-significant other who you still have sexual relations with, or a family member that you feel obligated to invite to get togethers.
friend: "man, who invited Bob to the party?"
other friend: "not me, but someone here had to bring that Shitbird"

dude: "man, it's been a long time since i got any play, im calling what's-her-face"
other dude: "oooooooh, bootycalling the Shitbird!"

uncle: "you know we don't approve of your brother and his 'wife'. why did you bring them to my party?"
nephew: "it's not my fault, he saw me making the beer run, i had no idea i was going to be Shitbirding today!"
by ray bot March 26, 2008
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Someone who has no use.
Sean McGuire is a shitbird because he's useless.
by Fryingcircus May 17, 2015
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anyone who doesn`t agree with your ideas, style, politics, or way of life.
That guy won`t listen to anything I say, what a shitbird.
by frank woods May 26, 2012
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Originates from the ye old mainer up alone on his porch talkign about the passer byers. Commonly used with the term little infront of it.
"oh look at that one he is a little shitbird"
by Justin B-K January 22, 2006
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A completely useless creature that does nothing but cause nuisance and aggravation.

Originally coined in the US Navy by sailors tasked with washing decks clean of the massive amount of avian excrement created by sea birds that shit all over everything.

Has come to define any living creature, human or otherwise, that is without redeeming qualities.
Sailor: "I just got assigned to swab the fucking launchdeck... The goddamn shitbirds flew over last night and completely destroyed it."
by AnusIacocca July 21, 2011
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An elected official such as Senator Ted Cruz (R-TX) who jets off to a Mexican beach resort while millions of his constituents suffer in sub freezing temperatures with no electricity, gas, or water.
During the extreme winter weather event of February 2022, Sen. Cruz jetted off to Cancun with his family for a warm beach retreat while millions of his constituents were literally freezing to death. Meanwhile his competitor for the seat, Beto O’Rourke ran a phone bank conducting welfare checks on vulnerable citizens. Ted Cruz is a shitbird.
by Blue Texas February 18, 2021
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