Rockets and jet planes eject burnt gases with force. The gas in turn react on the rocket or jet plane with force called thrust. Similarly water coming out of a plastic or rubber pipe exert thrust on it. Thrust and pressure are properties of fluids (gases and liquids). The total force exerted by a fluid (liquid or gas) on any surface in contact with it, is called thrust.
Thrust is measured in newton (N). The thrust exerted by fluid at rest per unit area of the surface in contact with the fluid (liquid/gas) is called pressure.
The air exerts pressure, you fill air in cycle or scooter/motor cycle tyres upto a certain pressure, the astronaughts and soldiers in places like Siachin wear pressure suits to avoid bleeding. Blood pressure becomes higher than atmospheric pressure at high attitudes. Under sea water, pressure put by it on the body is quite high.
The normal atmospheric pressure is one atmospheric pressure and according to the definition

p = F/A, its value in Nm^-2 is
1 atmosphere = 1.014 x 10⁵ Nm^-2
Normal atmospheric pressure is also measured in terms of centimetre or milimetre of mercury, 1 atm = 76 cm = 760 mm of mercury.
The SI unit of pressure is Nm^-2. Pressure is measured in pascal (Pa)
1 Pa = 1 Nm^-2
The air or gas pressure is also measured in bar or torr.
1 atmos = 1.014 bar
and 1 torr = 1 m m of mercury – 133.3 N m-2
1 atmos = 760 torr