When you really fancy someone and whenever you're around them your heart starts beating faster. Blood flow to the heart, resulting in a heart-on (punned with the more familiar "hard-on"). Sweet!
"You give me a real heart-on girl"
by Horse26 July 22, 2008
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The action of being in like, lust, or love with someone. Related to the act or statement to heart him/her. Generally accompanied by fascination/obsession with the individual in question. Typically used when the situation is too ambiguous to establish a true definition of what the relationship is....the fact that hearting is someone also sounds like the word "hurting" is an interesting coincidence, because sometimes hearting someone can be quite painful...
Girl: "I'm not sure he likes me"
Friend: "Well, based on his actions, I would say a good bit of hearting is going on. I think he'll ask you out soon..."
by anon-y-mous August 18, 2006
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Used to describe something you have memorized

It's a misnomer of course, but one that's used all the time
Do you know Danny's number by heart?
by contagion; June 17, 2009
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Knowing something for certain, but not wanting to admit it.
"But I know In Heart Of Hearts...
I know I'm never gonna hold you again, No..."(Phil Collins & Eric Clapton - "I Wish It Would Rain Down""
by Stop asking me for a pseudonym September 2, 2014
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An object that replenishes health. Usually found in grass and in pottery. A hero can carry a certain amount of hearts at a time. This amount can be increased by finding sufficient amounts of Heart Pieces (4 or 5) or finding a Heart Container. Hearts can be replenished by finding more hearts or with the use of potions (Red, Blue or Green). If all hearts are lost during a battle, the hearts can be instantly restored if a bottled fairy is in ones possession.
You got a Heart Container! Your life energy has increased by one and been fully replenished!
by The Great Fairy June 30, 2010
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makes a heart in html. usually used on myspace, livejournal, or other blogs of that sort. sometimes, (to be creative) kids will say "and hearts semi colon", but it is the same thing.
sometimes it is used to express love for someone, and sometimes it seems that the person is angry, but when the heart is added to the end of the sentence it becomes loving.
myspace comment 1: omgzz♥ i met you at that local show!!1!!1♥ even thought i just met you, i love you♥

myspace comment 2: fuck you bitch ♥
by brebunny May 18, 2005
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The final element needed to summon Captain Planet!
EARTH, FIRE, WIND, WATER, HEART

By your powers combined, I am Captain Planet!

And with the last word, he is indeed summoned!
by Captain Planet Summoner March 8, 2005
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