Word: tweetheart
Part of speech: Noun
Syllables: tweet
heart
Definition: A Twitter user with whom one is infatuated or involved romantically, especially if they were first met through the service.
Morphemes:
Affix: tweet
Language: en
PoS: Noun
Meaning: An entry posted on the microblogging service Twitter.
Affix: sweet
Language: en
PoS: Adjective
Meaning: Romantically fixated, enamoured with, fond of
Affix: heart
Language: en
PoS: Noun
Meaning: A term of affectionate or kindly and familiar address.