Wiktionary
blimp out
vb. (context intransitive slang idiomatic English) To become fat or fatter, especially as a result of excessive eating.
Usage examples of "blimp out".
Suddenly, one of the men who rose to get a another piece of wood for the fire, caught a glimpse of the big blimp out of the corner of his eye.
I had caught the daily blimp out of Venusburg just hours after I touched down, happy as a clam, my infraeye working beautifully.