Top definition
To get/ be extremely drunk to the point where you will most likely have a hangover
Alternatively, it can be used to signify a feeling of extreme tiredness to the point where it feels like you could have a hangover
Alan: We're all getting totally fossiled tonight, wanna join? (extremely drunk)
Alan: I feel so fossiled, man. (tired/hungover)
via giphy
by wobsandgobs January 15, 2019
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