pettifog/ʹpetifog/ verb intrans (pettifogged, pettifogging) archaic

• on the nail
• on the nose
• on the off chance
• on the one hand … on the other hand
• on the part of/on the part of somebody/on somebody's part
• on the prowl
• on the pull
• on the q.t.
• on the quiet
• on the qui vive
• on the rack
• on the rag
• on the rampage
• on the razzle
• on the rebound
• on the right side of
• on the right/wrong track
• on the road
• on the rocks
• on the ropes
• on the run
• on the score of
• on the scrapheap
• on the shelf
• on the side