What does all tweet no meat mean?

all tweet no meat meaning in Urban Dictionary

adj. Defines someone on twitter who's frequently insincere, often either by outright lying to or misleading other folks on twitter...They may do particularly this by articulating much more bravado via tweet than they really have.{Analysis of Word}It stems from the phrase "all chat no walk", except that beef relates largely to one thing of substance as a whole, and, (more especially) the cock...Funnily sufficient, because "A man's compound is essentially his cock" (NA), a better solidity of meaning is provided to this double-entendre, (beef).