Literal Translation:
Tentmaker spirit or Spirit [of the] tentmaker may be the English equivalent of 'Spiritus Khayyam'. The phrase is a mix of languages. The noun 'spiritus' is Latin for 'spirit'. The noun 'khayyam' is Arabic for 'tent maker'.
Spiritus Khayyam, the song by Globus:
The song Spiritus Khayyam by Globus is referring to the Hebrew word 'Khayyam' (קיים) rather than the Arabic word. Khayyam, in Hebrew, means everlasting, eternal, enduring. So the song title of Spiritus Khayyam means Everlasting Spirit, or Spirit of the Eternal.