When a person wearing jeans sits down and the zipper/button area sticks up, making it look like the wearer has an erection.
Known as the grown zone as that’s extra room for the penis to grow.
Kieran: Andy, look, Simon has a massive erection.
Andy: no that’s just his grown zone. Look, Emma has one too and I know for a fact she doesn’t have a penis.
Kieran: what?
Andy: ... what?
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