This word is usually used to describe someone who is very cool and popular. They are the coolest hip-hop kid in this eternity and everyone knows it. EVERYONE. It can also be used to describe someone who is sexy.
"OH MAN! Look at Derek, hes such a cheatachu!" Said Mark. "I know what you mean I wish i was him!" Jason said.
The act of cheating on your partner by performing sodomy with someone else in front of a Pokémon episode.
"I feel so guilty," confessed the man in a Pickachu shirt.
"Why?" pondered Ace.
"I cheatachued with Henry last night," responded the man.