downer vs nonpositive

downer

• Something or someone disagreeable, dispiriting or depressing; a killjoy. 

• A livestock animal that has collapsed. 

• A negative drug trip. 

• A form of industrial action in which workers down tools and refuse to work. 

• A drug that has depressant qualities. 

nonpositive

• Any value that is not positive. 

• Not positive; either zero or negative. 

• Not positive.