I can do that but I don't wanna
A stupid way of saying you're capable of something but you're still too lazy to do it. It's like pretending you're a king but you're still too tired to rule.
'I can do that but I don't wanna' after seeing your friend do a headstand and you're still sitting on the floor.
'I can do that but I don't wanna' when your teacher says you can take the test early and you're still going to sleep.
'I can do that but I don't wanna' when your mom says you can do the dishes and you're still eating cereal for dinner.