Yooouusshhhh

The act of jumping off something e.g. A chair, steps, logs or a pile of fish. Whilst you're mid air, push your lower jaw out and show your bottom teeth. Just as you land say 'yoooouusshhhhh'

Matt- 'Hey Steve whys Chris doing over there? I keep seeing him jumping off that car and making a weird face and noise.'

Steve-'Don't worry about him, he's just doing. Yooouusshhhh'.