An exaggerated version of the less than three emoticon (heart, love, or luv) used in online forums and chatrooms. Used to indicate extremely strong love or attraction; akin to the multiple hearts drawn over/around a lovestruck cartoon character.
If read aloud, this symbol is best pronounced "lotsa-hearts" or "loooove": the number of threes may vary, sometimes growing too long for a literal mathematical reading.
I <33333333 you so much!
I <33333333 it when we hug...
I <33333333 pizza.
I <33333333 that teddy bear you gave me!
The perfect number of 3s applied to the standard <3 heart. 7 3s is a way of saying "love you" (7 letter phrase) but through a heart rather than words. Only to be used though electronic messaging however.