This is a definition for situations or people that just don't deliver based on porn where the sex scenes run long but don't end with a big finish and you realize you just wasted time watching it for nothing.
(A) A vocal and outspoken person with no depth to their knowledge or statements.
(B) A movie, meal, vehicle, album or other experience that is built up with a lot of hype but fails to deliver.
Alternate usage just strokes and no load.
(A) He had a lot to say but it was "All strokes, no load"
(B) I was super excited to see the movie Battleship but it was "All strokes, no load"
(B.1) I went to that new restaurant getting all the hype but it was "just strokes and no load"