having a go
attacking; being aggressive
Example: He was having a go at me , so I punched him.
by the same token
for the same reason or reasons
Example: A desalination plant will be good in that it will provide drinking water, but by the same token it could ruin the fishing industry by making the sea too salty.
in vogue
fashionable; popular
Example: Flared jeans were in vogue in the seventies.
Here thought is the past participle of the irregular verb think. Follow the link to find out more and to listen to examples.
more information: think