know when to fold 'em
English
editEtymology
editAn allusion to a poker player knowing when to cut their losses rather than continue in an unfavorable situation.
Verb
editknow when to fold 'em (third-person singular simple present knows when to fold 'em, present participle knowing when to fold 'em, simple past knew when to fold 'em, past participle known when to fold 'em)