ERP

(slang) To act stupidly or foolishly.

(slang) To make a stupid mistake.

(slang, by extension, often, derogatory) To pretend to be something, to act as something, or to delude oneself into believing to be something.

(slang, humorous, often, offensive) An act of deliberately increasing the volume of the audio of music, often for humorous effect.

(transitive, intransitive, slang) To stare intensely and unremittingly at someone.