Mozilla's standalone e-mail client. It has excellent spam blocking, unlike Micro$hit Outhouse Express. It is available for Windows, Mac OS X, and Linux.
Thunderbird blows Outlook Express out of the water, or should I say the Internet.
by GastonRabbit August 01, 2004
One who takes a break during a workout when it's time to do intense exercises (i.e. burpies, 100 m sprints, and suicides)
Coach: "Alright maggots, time for suicides!"
*Thunderbird leaves*
Athlete: "There's thunderbird again!
by #Daequanmovement July 27, 2014
Well.....the thunderbird begins with skailng a high peak or mountain in hopes of finding an eagle.(endangered in the US)

1)Proceed to put a bag over the eagles eyes to blind it.
2)bring the eagle to your next sexual encounter
3)when you are about to climax, nut all over the eagle
4)Raise the eagle high over your head and proceed to spike the eagle in a violent manner in your partners face
5)the eagle in its paniced state will violently slash with its talons and its wings, spraying your jism all over your bloody parner
6)Smother the eagle with nearest pillow(Prenant nun style)
7)Slap some 5's and tell all the bros....You will be the KING
"I totally thunderbird'd that chick last night, now she's prenant and I'm sentenced to 25 to life.....It was tit's"
by Ened Johnson October 12, 2007
Verb.

To enter/exit a chair/stool etc. from above - usually accompanied by the Thunderbirds theme tune.
There was no space to move - so James had to Thunderbird into his chair.
by Monkey_Guy September 14, 2004
Large set women with weight issues.
That Gary would bounce anything... Gary even thinks Thunderbirds are "go".
by glenbruce January 11, 2010
To call an end to a meeting, session or shift, usually done by some form of authority, releasing those underneath him or her from duty until the next appointed time.
My boss called "Thunderbird" at 2:30, so I was able to come home early.
by Jay Walker June 28, 2006
To fuck a girl in the ass, having put one's balls in her pussy.
Yo bitch! How much to thunderbird that shit?
by Steven Yard June 14, 2010
A lady who has eaten too many twinkies.
That thunder bird has to weigh 400 lbs.
by JT November 11, 2003

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