score off

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

• verb transitive, idiomatic, slang To defeat (especially in an argument), get the better of, achieve a success over, gain an advantage or win points over, make a point to the detriment or at the expense of, make appear foolish. Sometimes with particle on (someone).
• verb transitive, idiomatic To delete or remove (especially from a list); to score out, strike out or strike off, cross out or cross off; to draw a line through.
• verb Used other than as an idiom: see score,‎ off. To score from.