tighten up

== English == === Verb === tighten up (third-person singular simple present tightens up, present participle tightening up, simple past and past participle tightened up) (transitive) To make sufficiently tight. (transitive) To fix something or make it correct. (intransitive) To become tense and restrained. (intransitive, transitive) To become stringent and ungenerous. (intransitive) To become focused and serious; To stop any vacillation or inconsistency.