It’s an adjective and it means not having or lacking enthusiasm. If someone is unenthusiastic about something it means they are feeling indifferent, apathetic, passive, phlegmatic, lukewarm, listless, languid, lethargic, emotionless, perfunctory about it.
being unleet means being 1337 wifout the 1337/leet/eliteattitude.
Not n00b nub or newb !
<person1>are there stupid questions <person2>there are no stupid questions only stupid answers
<person3>U n00b 4sk!ng th4t mak3s m3 w4nt t0 p4wnz0r u 4rs3 b3w4r3 0f i h4x0rz sk!lz
<person3> is wanna be leet, <person2> most likely unleet