Third-person singular simple present indicative form of blow up in one's face

present participle of blow up in one's face

(slang) To talk in a boastful or overweening manner.

(automotive, engineering) A reference to the Otto cycle and four-stroke internal combustion engines.

(Canada, US, slang, vulgar) Alternative form of blow smoke

An action or occurrence must be very bad indeed if it brings no benefit to anyone.

Alternative form of it's an ill wind that blows nobody any good

One doesn't require an expert to tell one what one already knows.