1. custard pie - Noun
2. custard pie - Verb
a prop consisting of an open pie filled with real or artificial custard; thrown in slapstick comedies
Source: WordNetcustard-pie
Whatever is funny is subversive, every joke is ultimately a custard pie... a dirty joke is a sort of mental rebellion. George Orwell
God always has another custard pie up his sleeve. Lynn Redgrave
God's always got a custard pie up his sleeve. Margaret Forster
And what's interesting about him as a comic character is that the custard pie hardly ever ends up on his face. Rowan Atkinson
There were also two "Rhubarb Tart" songs, one sung by Cleese, which he also sang in At Last the 1948 Show, and one sung by Oddie, which became "The Custard Pie Song" in the TV series The Goodies. Source: Internet