[they walk out onto the patio, where a chef is cooking on the grill]
RORY: Hey, cool!
LORELAI: What’s up, Poppin’ Fresh?
Poppin’ Fresh, otherwise known as the Pillsbury Doughboy, is an advertising mascot for the Pillsbury Company’s refrigerated dough product line, created in 1965. His slogan is, “Say hello to poppin’ fresh dough!”. He’s a boy made of dough who wears a chef’s hat, hence Lorelai’s greeting to the chef.
The Annotated Gilmore Girls 