The Onomatopoeia of a steam train. This noise is often made by children who are not yet old enough to cross the road by themselves, or downies. Therefore this can also be slang for a train.
Stand back from the platform or the cho cho will give you a bo bo.
Butterfly. It's written as "cio-cio" in Italian, and Cio-cio is the name of the main character in the opera Madama Butterfly. In English it is usually spelled cho-cho. It's used more commonly as a pet's name than as a slang word for butterfly.
The calico kitten was dappled with so many colors that she looked like a pretty little butterfly. He decided to name her Cho-cho, his pretty cho-cho.
When a male ejaculates on the chest of his partner, the male then mounts the his partner, using the semen as a lube to slide against his partner while pumping his fist and making the sound train whistle.
NOTE- Ejaculate can be interchanged with fecal matter. This is called Charlie's brown line.
Brandon Cho Cho Charlied nick so hard last night he gave him a bloody nose.
Man nick left skid marks on my chest last night after he Cho Cho Charlie me.