1 definition by Lex Lemon

Top Definition
To feel dull, or an ache, heavy, tight or otherwise unwell in your heart. Occurs when someone you love is far away, or you've done something to hurt them and you don't know how you'll fix it, or when fate conspires to keep you apart, or in any less serious but just as pathetically painful situation.
Girl: Hannah's been away for two weeks already. Getting her post-card just made me feel so...

Friend: Heartsick.

Girl: Yeah. Heartsick.
by Lex Lemon December 11, 2010

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