Eric Patridge, in his Dictionary of Slang and Unconvential English
, has:bless oneself
. Ironical for curse: from ca. 1600; coll. After ca. 1800 S.E. 'How my Lord Treasurer did bless himself', Pepys in his diary, April 1, 1665. Also, to bless
another: to reprimand, scold, curse at, swear at him: coll. > S.E.; C. 19–20.
Also, the word bless
has an interesting etymology: OE blœdsian
'to bless, wish happiness, or consecrate'. It is cognate with the word blód
'blood' and originally meant something like 'to consecrate or sprinkle with blood'. A cognate verb does not appear in other Germanic languages.http://www.bartleby.com/61/18/B0321800.html