This is the 859th most frequent Turkish word.
tanju
"Tanju" is a Turkish proper noun, commonly used as a male given name.
In this sentence, 'Tanju' is a proper noun, used as a person's name.
Tanju dün gece bir konser verdi.
Tanju gave a concert last night.
Here, 'tanju' is used colloquially as an adjective for odd or inappropriate.
Böyle bir şaka yapman da pek tanju bir hareket değil.
Making such a joke is not very appropriate behavior.
In this instance, 'tanju' is creatively used as a noun for an imaginary plaything.