Dreams involving substances like marijuana can often reflect feelings of desire for escape or relief from stress. The massive bag of weed may symbolize a longing for freedom or indulgence, while the act of hiding it suggests a fear of judgment or disapproval from those close to you, like your mom and sister. This could indicate a conflict between wanting to enjoy life and the responsibilities or expectations you feel from your family.

The part of the dream where you accidentally posted your face on TikTok might represent vulnerability and the fear of being exposed or judged by others. It suggests a concern about how you are perceived socially and a desire to maintain control over your image.

Overall, this dream could be highlighting themes of escapism, family dynamics, and social anxiety. It may be beneficial to reflect on your current life situations and relationships—are there areas where you feel pressured or judged? Understanding these feelings can help you navigate your waking life more confidently.