This is a children's song that teaches spelling and rhythm.
You sing B-I-NGO the first time, then drop the first letter and clap on it the next time:
clap-I-NGO, and keep dropping letters throughout the song.

G / /  / | C  D G /
G / Am / | D7 / G /
Em / C / | D7 / G /

There was a farmer had a dog and
 Bingo was his name-o
B-I-N-G-O   B-I-N-G-O    B-I-N-G-O
and Bingo was his name

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