write off

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb accounting To reduce an asset's book value to zero
• verb accounting To record an expenditure as an expense.
• verb accounting To remove a portion of a debt or an amount of an account owed to you counting it as a loss (as a gesture of goodwill for example)
• verb accounting To record a notional expense such as amortization or depreciation.
• verb Figuratively, to assign a low value to something.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb write something fluently, and without hesitation
• verb concede the loss or worthlessness of something or somebody
• verb cancel (a debt)
• verb reduce the estimated value of something