"yuk it up" in Chinese (Simplified)
大笑开怀大笑
Definition
大声笑并一起开玩笑，通常在一群人中，气氛轻松愉快或有些傻气。
Usage Notes (Chinese (Simplified))
非正式用语，美国英语为主。多描述朋友或团体闹着玩、开玩笑并大笑。不能用于正式场合，也不适合描述一个人独自笑。
Examples
After dinner, the kids yuk it up in the living room.
晚饭后，孩子们在客厅里**大笑**。
The students yuk it up during lunch break.
学生们在午休时**开怀大笑**。
Sometimes they just want to yuk it up with friends.
有时候他们只想和朋友们**开心大笑**。
They were really yukking it up at the bar last night.
昨晚他们在酒吧里**大笑不停**。
Stop yukking it up—the neighbors can hear you!
别再**大笑**了，邻居都能听见！
Whenever those two get together, they can't help but yuk it up.
那两个人一见面就总是**大笑不停**。