しっかりしろpull yourself together, get a grip, get a hold of yourself, come on

先生(せんせい)：「お前(まえ)らは高学年(こうがくねん)だ！しっかりしろ！」

Teacher: "You guys are upperclassmen! Pull yourself together!" {pull yourself together, get a grip, get a hold of yourself, come on}

救急(きゅうきゅう)隊(たい)：「しっかりしろ！お前(まえ)はまだ死(し)んじゃダメだ！」

Emergency Team: "Pull yourself together! You can't die yet!" {pull yourself together, get a grip, get a hold of yourself, come on}

母(はは)が息子(むすこ)に：「あなたには妻(つま)がいます、責任(せきにん)を持(も)って！しっかりして！」

The mother said to her son: "You have a wife, be responsible! Pull yourself together!" {pull yourself together, get a grip, get a hold of yourself, come on}

父(ちち)が息子(むすこ)に：「しっかりしろ、万(まん)が一(いち)僕(ぼく)が死(し)んだらお前(まえ)が一家(いっか)の大黒柱(だいこくばしら)だ。」

The father said to his son: "Pull yourself together. If anything happens to me, you'll be the pillar of our family." {pull yourself together, get a grip, get a hold of yourself, come on}

どうやら先輩(せんぱい)は僕(ぼく)に激励(げきれい)の気持(きも)ちを込(こ)めて「しっかりしろ！」と言(い)ったらしい。

It seems that my senior, with a sense of encouragement for me, said "Pull yourself together!" {pull yourself together, get a grip, get a hold of yourself, come on}