1 definition by L.A.H

a boyfriend/girlfriend you have had for all of highschool and maybe even marryed. a sweat heart is:One who is loved. and highschool:a public secondary school usually including grades 9 through 12 therfore a highschool sweetheart is somone you "loves" all throughout highschool.
i am marryed to "bob", he was my highschool sweetheart.
by L.A.H November 16, 2007

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