#1 puff up v. make larger or distend; "The estimates were puffed up". wn #2 puff up v. to swell or cause to enlarge, "Her faced puffed up from the drugs"; "puffed out chests". wn #3 puff up v. become filled with pride, arrogance, or anger; "The mother was swelling with importance when she spoke of her son". wn #4 puff up v. praise extravagantly; "The critics puffed up this Broadway production". wn