Well, a fair definition of tickling is touching parts of the body in a mock attack.

胳肢的准确定义就是,打打闹闹时碰身体某个地方。

耶鲁公开课 - 心理学导论课程节选

You have to realize that this is a mock attack; you're simulating attack.

必须打打闹闹时才行;,你是假装要打对方，不是真打。

耶鲁公开课 - 心理学导论课程节选

It's sort of a mock parallel government with his buddies.

这是个他和他的狐朋狗友们模仿的政府

耶鲁公开课 - 欧洲文明课程节选

The general story of why we can't in general is because there's no surprise, there's no mock aggression, and also there may be a general deadening of self-stimulation.

为什么大部分人不能胳肢自己,是因为它在我们意料之内，没有打闹的侵略性，通常这种引自己笑的念头都会嘎然而止。

耶鲁公开课 - 心理学导论课程节选