1) Ruff 2) To execute a crossruff 3) Trump 
• (n.) The play in whist where partners trump each a different suit, and lead to each other for that purpose; -- called also seesaw.
Cross'ruff` noun (Whist) The play in whist where partners trump each a different suit, and lead to each other for that purpose; -- called also seesaw . 
[v] - trump alternately in two hands
verb trump alternately in two hands