bosh vs double bass

bosh

• A fiddle (musical instrument). 

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

• Nonsense. 

• An expression of disbelief or annoyance. 

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

• To consume (illicit drugs). 

double bass

• The largest stringed instrument of the violin family. 

• The deepest of all male voices.