The photo shows a young man with a tattoo on his forearm that reads "Thanks mother for my life." The joke, in Turkish, plays on the awkwardness and unintended humor of the phrase. The joke isn't in the *meaning* of the tattoo itself, but in the *poor grammar* and *style* of the tattoo. The humor is in the naivety of the person getting the tattoo. The phrase "Thanks mother for my life" is grammatically incorrect in Turkish and would more likely be written as "Annem, hayatım için teşekkür ederim." or more concisely "Hayatım için annem'e teşekkür ederim." The humor comes from the fact that the phrase, even if understandable, sounds very unnatural and slightly cringe-worthy, in this setting, likely done by someone not fluent in Turkish or perhaps with a poor understanding of grammar. The perceived "clumsiness" of the tattoo is humorous.