Is it permissible to use titles such as "garbage," "school," and "mosque" jokingly, and does referring to oneself as "mosque" constitute mockery of religion?

It is impermissible to say "you are trash" when prohibiting the use of offensive nicknames. Saying "you are a school" is permissible if it is free from envy or malice. Likening oneself to a mosque is a blameworthy self-praise. These statements are not considered mockery of religion. It is advised to disregard obsessive thoughts regarding mockery of religion and to busy oneself with learning, da'wah (inviting to Islam), and community service.