延えん長ちょう前ぜん半はん

Meanings

1

first half of extra time

Used in soccer (football) to refer to the first 15-minute period of extra time played after a tied match.

延えん長ちょう後こう半はん
Refers to the second half of extra time, as opposed to the first half.
延えん長ちょう戦せん
General term for extra time or overtime in sports, not specifying which half.

Compound of 延長 (extra time) and 前半 (first half).