hot air 
noun [mass noun] informal
Empty talk that is intended to impress: they dismissed the theory as a load of hot air...
- One could hardly fail to see the parallel of two vast but empty projects full of little but hot air and blasted hopes.
- Women talking are doing more than just filling the environment with hot air.
- So all the huffing and puffing from Free TV Australia is just special interest hot air.
- plug nozzle
- plugola
- plug point
- plug riots
- plug something in
- plug-switch
- plug tap
- plug the gap (or gaps)
- plug-ugly
- plug valve
- pluiff
- pluke
- plum
- plumaceous
- plumach
- live-stream
- live the dream
- live thorn
- live to fight another day
- live together
- live to regret something
- live to tell the tale
- livetrap
- live-tweet
- live up to