Unconventional attractiveness or sexyness, especially with regards to a
person who is considered to be mediocre or pedestrian in their appearance, but not necessarily unattractive. Often the attraction cannot be easily explained, meaning a
person who sees another person's shmeck cannot say why they find them
hot.
'Shmeck' generally pertains to a person's body.
Can be noun version of 'shmexy'.
"I
never expected to like a
bald person, but that guy has the shmeck!"
"Most people wouldn't
go for that girl, but she has some real shmeck about her which I can't resist!"