つまんなっちゃダメ
tsumannaccha dame
1. Don't get bored.; Don't have fun.
★ Common
Adjective
#13316
1. Don't get bored.; Don't have fun.
1. to be packed (with); to be filled
2. to be blocked (of a pipe, nose, etc.); to be clogged
+ 5 additional meanings1. damage
1. Don't come out.; Don't blurt out.
1. Don't overdo it.; Don't go too far.
1. Not allowed to be born.; Don't be born.
1. No.; I cannot.
1. Not bad.; It's not impossible.