Internet meme started in the Dungeons & Dragons Online MMORPG first and then refined (mostly in form) in the DDO Forums.

The definition is hard to quantify. Some would call it a "slam" or some sort of "snarky" reply. While that can be true it is much more subtle than that. It's meaning is more of a feeling than anything else. How can one possibly define Love adequately? They can't, of course, and likewise, no one can adequately define Hi Welcome

Form: Just to review the form quickly, it should always be written with a capital H and a capital W. No punctuation is permissable either. It should always be written - Hi Welcome and no other way. If you're writing it in another language (and assuming the language has capital letters), only the first letter of each word should be capitalized and again no punctuation is used. The lone exception to the "only the first latter in each word is capitalized" rule is for the Chinese form not written in characters. In this case Ni Hao HuanYing is correct. This is due to a peculiarity of the Chinese language.
Here is one example:

Someone (most likely a n00b or a known forum jackass) has just given a long forum rant displaying a lack of experience, social adeptness, and most of all...intelligence.

You reply with: Hi Welcome

In this particular case it may mean, "Allow me to welcome you both with my literal words and with an active display of how much you fit in by being tone deaf, dumb, and uncritical of your babbling myself. Because anyone able to engage your arguments would rip them to shreds, the most sincere welcome you can get is from someone unwilling to do so as demonstrated by their simple vocabulary and punctuation and seeming lack of thought put into the response."
by Arkat August 12, 2010
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1. This dope band with cool beats

2. A kit that realtors give to people to welcome them to their new home
1. Damn son, I get down to The Welcome Kit

2. Damn son, that ho just gave me a welcome kit and now I'm ready to move in to my new house!
by Anonymousyodoghellatight January 18, 2009
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When your about to cum inside of a girl you look her in the eyes and scream "welcome to moe's!"
Charlie is having intense butt sex with a girl and he came inside her and yelled "welcome to moe's!"
by willman2714 January 31, 2011
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Welcome home is said to military men and women who have returned to the United States typically after being involved in a military conflict. Tradition starting after the disappointing returns so many soldiers received after the Vietnam War. Lately it has been used for any person in the military.
When I found out that John's friend was a returning soldier from Afghanistan as well as the Iraq war I told him, "Welcome Home" and shook his hand heartily.
by Army Brat July 20, 2005
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An expression used to explain any unusual, unpleasant, or semi-surprising thing that occurs while within the state of Michigan. Can be applied to almost anything and commonly used with the expression "puts hair on your chest".
Anna: The rock exploded in the fire.
Alex: WELCOME TO MICHIGAN!

Joey: The car won't start.
Alex: WELCOME TO MICHIGAN!

Nick: My foot is bleeding.
Alex: WELCOME TO MICHIGAN!

Courtney: I peed myself laughing.
Alex: WELCOME TO MICHIGAN!

Ashlee: It's really cold here everywhere.
Alex: WELCOME TO MICHIGAN!
by welcometoMI July 18, 2009
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