Japanese by Example
Learning through examples in manga

Being at my limit is no good with あかん

名探偵コナン » Volume 12 » Page 125

At a special event, the expected host doesn’t show for dinner. After finishing their meals, the guests continue to wait until past midnight. As most guests decide to retire to their rooms for the night, Heiji finds himself yawning.

平次(へいじ):
あかんオレももう限界(げんかい)や…」
"No good, I'm also already at my limit..."