Titser means that the teacher has a nice rack. It is derived from the word Teacher. A teacher is to teach, as a titser is to tits. A titser uses her boobies to get the attention of the students, but the students are really paying attention to somewhere else (particularly the titser's tits).
by mike0913 April 02, 2008
A woman whose tits are very large and does not wear a bra so they jiggle and bounce for everyone to see. Also u can see her nipples.
by Skello194 June 13, 2013