つまんなっちゃダメ
tsumannaccha dame
1. Don't get bored.; Don't have fun.
★ Common
Adjective
#1190025
1. Don't get bored.; Don't have fun.
1. damage
1. to be packed (with); to be filled
2. to be blocked (of a pipe, nose, etc.); to be clogged
+ 5 additional meanings1. to soothe; to calm
1. fundamentals
1. Pressing; Approaching