"Big Back” is a slang term for someone who is overweight or who eats a lot. No one should be calling anyone a “Big Back.” “Big back” is slang for an overweight person, a “food lover” or someone who ...

“Big back” is slang for an overweight person, a “food lover” or someone who eats a lot, according to Urban Dictionary. People on TikTok use “Big Back” as a caption on videos wherein they cook ...