A long penis. Not necessarily a complement. Can be used with a nickname.
1) Momo, pull that longdong out of your mouth.

2) Hey, where's Longdong Tom?
by AIDS_Pizza January 9, 2012
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I can't spell penis but it doesn't matter 'cause I'm a longdong.
by IWantKyle August 13, 2008
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To call someone peng/attractive. In more blunt terms, it means you would like to give someone the large fallace. Usually said about women (although not directly) or gay men.
Eggy: oi nah how did claud go from looking ugly to looking so longdongable
Yorkie: she's your stepsister wtf

Sandall: oi nah Nora is so longdongable
Maiden: wtf you chattin
by Yorkie595 September 5, 2017
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Master of the dongs, long dong is a bad mofo, don’t take shit from nobody, he will stick is king shaft right in the middle of a argument and let his shaft be heard.
That boy lord longdong just aggressively pelvic thrusted the chess board
by The all knowing hades April 8, 2022
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Jonny longdong is a man called jonny with you probably allready know has a long dong
Have you heard of jonny longdong 'slong dong
by Jonny longdong August 13, 2022
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compressed rice cakes usually served with curry or stew
Wow, this longdong taste so good!
by mattrep April 28, 2023
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