Song by Chinaski: “Slovenský klín” is a popular song by the Czech band Chinaski, released in 2014 and 2016 versions, featuring Michal Malátný and Slovak singer Bára Hosnedlová. The song celebrates the cultural and historical closeness between Czechs and Slovaks, referencing their shared history as part of Czechoslovakia. The phrase “Slovenský klín” in the song metaphorically alludes to the idea that every Czech flag carries a “Slovak wedge” (klín), symbolizing the enduring connection between the two nations despite their political separation in 1993. The lyrics are nostalgic, playful, and romantic, often mentioning shared experiences and the phrase “Made in Czechoslovakia.”

(http://www.autoadmit.com/thread.php?thread_id=5744227&forum_id=2#49056999)