'write off' definitions:

Definition of 'write off'

(from WordNet)
verb
Concede the loss or worthlessness of something or somebody; "write it off as a loss"
verb
Write something fluently, and without hesitation
verb
Cancel (a debt)
verb
Reduce the estimated value of something; "For tax purposes you can write off the laser printer" [syn: expense, write off, write down]