OTF is an abbreviation for a term in the
United Kingdom and Ireland called 'out the fuck' commonly used if someone is sitting in your seat during a rugby or football match, or used in any general situation where someone is where they're not supposed to be.
If you have a REALLY strong Irish,
Northern Irish or
Scottish accent you may say 'out teh fuck'
someone took your seat in
additional maths
comes into room
morris: *
whistles while putting finger in upwards motion* out
the fuck (OTF)
trevor: right okay *finds other chair*