A word used in Northern Ireland. A hydrid of 'slapper' and 'dog', commonly used to describe a sexually promiscuous but unattractive female. Think fat girl in a mini skirt who presumes her self esteem will rise with the amount of men she sleeps with.
Look at that stupid slapdog trying to pull again.
by PaulaShouldTakeTheGlory April 08, 2004
Dirty dirty girl ie local spunk bucket happily suck your bobby after its been up her arse.
Have you been with that slap dog? She would give you galloping knob rot.
by Baby Ange October 12, 2004