Definition of 減らず口 (へらずぐち)
へぐち
                        減らず口
へらずぐち
herazuguchi
noun
•
        
impudent talk, speaking without thinking, continuing talking even after one has lost an argument, (getting in) the last word, talking back, needless retort
Related Kanji
| 減 | dwindle, decrease, reduce, decline, curtail, get hungry | 
| 口 | mouth |