When the paper wrapping around a fatty item of food (traditionally, a fish-based item such as fish and chips or a fish sandwich) turns translucent due to having absorbed a large amount of grease.
"If you're not sure about something, rub it against a piece of paper. If the paper turns clear, it's your window to weight gain."
by Zerotime January 22, 2009
Get the window to weight gainmug. by Vianni La Performer April 8, 2022
Get the Gaining Weight Shamingmug.