piping hot
Very hot. Usually said of food that has just been taken out of the oven and has steam "piping" out of it. Cook the casserole in the oven for 40 minutes or until it is golden brown and piping hot.
piping hot
[of food] extremely hot. On a cold day, I like to eat piping hot soup. Be careful! This coffee is piping hot!
piping hot
Very hot, as in These biscuits are piping hot. This idiom alludes to something so hot that it makes a piping or hissing sound. [Late 1300s]
piping hot
very hot. Piping describes the hissing or sizzling noise made by food taken very hot from the oven. The phrase was earliest used by Chaucer in The Miller's Tale: ‘And wafres, pipyng hoot out of the gleede’ (‘gleede’ is an obsolete word for a fire).
1997 Sunday Times Try the chilli cakes… served piping hot from food stalls on the beach.
piping hot
Very hot: piping hot biscuits.