To fart.
let on
to reveal or indicate, especially unintentionally or against one's wis…
let the cat out of the bag
To disclose a secret; to let a secret be known, often inadvertently.
let alone
Much less; to say nothing of; used after one negative clause to introd…
let down
To disappoint; to betray or fail somebody.
let sleeping dogs lie
To leave things as they are; especially, to avoid restarting or rekind…
let slip
To divulge a secret, as by accident or mistake.