(idiomatic) Under great pressure to perform. / (poker) Of, pertaining to, or in the situation of first player to act on the first round of betting.

a large blowlamp used to control weeds etc.

A heavy-duty device for driving staples directly into wood or other material.

(fishing) A form of mechanical gun that fires a spear as a projectile; generally used under water when spearfishing.

(nautical) A gun moved temporarily from its normal broadside position to fire through the chase ports in the bow or stern of a ship.

(nautical) A gun that fired a small rocket with a line attached, used to rig a breeches buoy.

(science fiction) A fictional weapon that emits harmful rays.

Alternative form of gunshy

A levered device for forcing grease into machinery. / (colloquial, due to its appearance) A small machine gun, particularly the .45 calibre M3 used by the US in WW2.

(dated) A revolver with a cylinder that holds six bullets.