All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
There is no sin on the one who laughs or smiles when he hears the word Qayloolah (siesta), and this is not considered a mockery of the Islamic religion.
We advise you to ignore these whispers and not give any attention to them.
For more benefit on whispers, please refer to Fatawa 374308 and 356689.
Allah Knows best.