The discharge line (soil ) may be slightly back pitched so it takes longer to drain
Because the flapper is stuck.
I do not know if popcorn can be flushed down the toilet. So, I wouldn't try it.- Ashton Smith
The sewer
Depends on if it needed to be flushed or not.
Bad venting
Water and waste
Cotton buds SHOULD NOT be flushed down the toilet. Anything flushed down the toilet that is excrement or toilet tissue my block the sewers and cause backup of sewage effluent into homes.
In ancient Egypt
No you can't
NO way
no
SWIM!