Definition of "soz"

I'd like to apologise, unreservedly, to pigs everywhere, but especially those on my farm […] So Hermes pig collars all round to my herd and soz soz soz.

1996 September 1, “Dear Annie: Ready to wear”, in Independent on Sunday‎

I'm soz about what happened.

1999, “Love Comes to Royston Vasey”, in The League of Gentlemen, season 1, episode 5, spoken by Henry Portrait and Ally Welles

Soz Mike, I thought you were showing me a fool proof way of going xna

2001, Jocyber, “Morning'”, in alt.fan.scarecrow‎ (Usenet)

Soz for bringing it up again, but it is good to have a healthy attitude towards this..!!!!

2002, *Patrick-Blue*, “Soz I Missed This (look) ??”, in alt.sports.soccer.everton‎ (Usenet)

U2 says soz for online snafu [title]

2005 February 7, John Oates, “U2 says soz for online snafu”, in The Register‎

Does it auto update when the disc is inserted or will i[sic] get the option to ignore the update?¶ Or do i[sic] just DL pal games to be on the safe side?¶ Soz for all the questions but wanna make sure I get it right

2007, >{daZza}<, “Wii info”, in alt.warez.uk‎ (Usenet)