A physical reaction that occurs with a males reproductive organ when sexually aroused. Blood fills the shaft and the Penis becomes erect and firm. The cowpers gland kicks into gear producing the clear fluid that trickles from the end of the tip. Making a wet spot in the shorts or dribbling off or down the erect crank. What happens beyond that is determined by the situation at hand. No pun intended. He has achieved a Thoroughly Hard Upright Dick. Thud.
While I was sniffing Theresa's Balloon Knot, I got one hell of a Thud and ending up pulling the old Bung Licker act on her. Her Gumhole softened right up and she let me Cornhole her like mad. She said I was the best Anal Intruder she has ever experienced.
by The King Cornholer April 16, 2008
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the sound/action Grobanites make when they see a hot picture of Josh Groban

by Rachel March 28, 2005
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A limo usually carrying large amounts of men with limp dicks often smoking
Wow that thud sure is nice
by Evil Victor June 11, 2015
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Helping someone/doing something for them without them knowing, because they don't believe they can do it themselves.
Lucas thudded Peyton when he submitted her drawings to Thud Magazine; after she threw them in ten trash and walked away because she thought they weren't good, but they were.
by ns2312 September 26, 2015
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Short and easy version of *falls on the floor, having fainted, and makes a thudding noise*
On MSN, AIM etc:

Person 1: ZOMFG, celebrity x is so hot! Look at this pic!

Person 2: *thud*
by thelizz October 7, 2006
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Nickname given to the Republic F-105 Thunderchief. The Thunderchief was primarily used as a Ground attack aircraft during the Vietnam War.
The Thuds rolled in and gave Charlie a wake-up call he'd never forget!
by JonathanChance September 29, 2003
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Acronym for That Huge Ugly Dick.
When Ashley saw his THUD for the first time she cried in fear and disgust, then proceeded to instinctively suck it dry.
by Matthew Tremor IV August 16, 2017
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