Rambo

Etymology
See also.
 * The name "Rambo" is of unknown origin. It can be dated back to the 17th-century Swedish immigrant Peter Gunnarsson Rambo. According to folk legend it is derived from the mountain Ramberget ("Raven’s Hill") in Gothenburg, whence the Swedish immigrants to Delaware originated in the 17th century.
 * "Rambo" is also the name of an old farm in Vestfold county, Norway ("Rambøe" 1664, "Ramboe" 1723) - and about 65 people in Norway have Rambo as a family name. The Old Norse form of the name might have been *Hrafnabú. The first element is then the genitive plurals of hrafn m. 'raven', and the last element is bú n. 'farm'. The name was brought to the US by Norwegian settlers.
 * "Rambo" became widely known after John Rambo, a fictional Vietnam War veteran and protagonist of the film series Rambo.

Noun

 * 1)  One who is reckless, disregards orders, uses violence to solve all problems, and bravely charges headlong into the teeth of the enemy.
 * 2) An American variety of apple with a greenish-yellow skin, mottled and striped with dull red.

Synonyms

 * loose cannon