"stricken by malignant forces (natural or supernatural), cursed, blighted," 1550s, from blast (v.), with the notion of "balefully breathed upon." In the sense of "cursed, damned" it is a euphemism attested from 1680s. Meaning "drunk or stoned" dates from 1972, perhaps from the condition of one so affected, but blast (v.) "smoke marijuana" is attested from 1959.
)window.location='https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=byronic106@yahoo.com&lc=US&item_name=Donation+to +Help+Keep+Etymonline+Free+and+Open&no_note=0&cn=&curency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted'){kind=link}