bosh vs true that

bosh

• To consume (illicit drugs). 

• The lower part of a blast furnace, between the hearth and the stack. 

• A fiddle (musical instrument). 

• Nonsense. 

• An expression of disbelief or annoyance. 

• An expression of speedy and satisfactory completion of a simple or straightforward task. 

true that

• Used to show agreement; indeed.