freak out: 吓一跳
Because becky would totally freak out.
因为贝卡肯定会发疯的。
This photo will only make her freak out.
这张照片只会让她抓狂。

screw up: 搞砸
Sometimes we just screw up.
有时候，我们就搞砸了。
This can really screw up you and your success.
这真的会毁掉你自己及成功的机会。

laugh at: 嘲笑
Everyone coming our way slowed down to point and laugh at him.
每个路人都放慢脚步，指指点点地取笑他。
Perhaps people would laugh at you?
可能别人会嘲笑你吗？