Third-person singular simple present indicative form of let up

(idiomatic, colloquial, usually sarcastic, dismissive) Indicates that the speaker does not agree with a proposed action, and does not wish to participate.

Alternative form of let's get the party started

(idiomatic, informal) Let's go; let's get this done; let's start more intense action.

(idiomatic) Let's start; let's begin (a journey, undertaking, etc.).

Alternative form of blow off steam

(intransitive, idiomatic) To disregard or ignore a past difficulty in a relationship or an offence (when dealing with another individual).

(idiomatic) To be tolerant; to enjoy the pleasures and opportunities which life offers and to allow others to do the same.

(slang) To fart.

(informal) To set off or allow to begin.