Top definition
To have no mercy.
Eg, there will be no mercy to your anus because I am merciless.
by ELGoR March 19, 2003
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
to be really good in bed; to go hard & fast; to have no mercy
"so how was it?"
"he was MERCILESS"
by hickz =] August 25, 2008
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3
Strongbad-ism
1. To be very tall like quincy
Some people are very tall and merciless, quincy is destroying san atonio
by Are Bee September 23, 2003
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4
To use all 10 fingers to type on a keyboard at the same time.
dfhaskjfkjvcnawernsdhfkajh
by mastr July 21, 2003
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5
to b extremely good at bf that he doesnt need to prove it unlike genreaper who is like a fuck unlike merc who is leet...
by uknowwhohunny July 23, 2003
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6
To smoke and become extremely wasted to the point that no word said can be understood by a normal human being.
Oh, u are sooo Merciless
by mastr July 21, 2003
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